Windows Support Forum

CMOS Battery Replacement Thinkpad 600

Q: CMOS Battery Replacement Thinkpad 600

Did a search or two and didn't find this info anywhere on here so thought I would post it for any who need to know how exactly to replace the CMOS battery in their IBM Thinkpad 600 series notebook.

The above link will take you directly to the instructions.

Possible error numbers/messages that point to this problem:

0161 Dead Battery
0173 Configuration Data was Lost
0192 Fan Error
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Preferred Solution: CMOS Battery Replacement Thinkpad 600

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I have a T30 that will occasionally lose the time on boot and sometimes throw the "CMOS bad checksum" error so I believe the CMOS needs to be replaced.

I've been looking online but I'm seeing a lot of random "high capacity" or fake listings. Does anyone have a good source to buy a good or the official replacement part?
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Regardless of the fact that I am a comlete novice, I'll be diving recklessly into my friend's thinkpad 600 to replace the cmos battery. I know. It's not scud defusing. But I don't know anything. Can any one tell me where I can get (a) basic instructions and repair techniques / dos and don'ts specific to laptop tinkering, as well as (b) free Thinkpad technical documentation. I mainly just need to be able to get to the mobo and change the battery without ****ing anything up.

Any and all help appreciated...


A:thinkpad cmos battery

It should just be a matter of removing one of the covers on the bottom of the laptop. I think the cmos battery on those is next to the memory..could be wrong though, It should just be a matter of popping or sliding it out, and putting a new one in!
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when replacing dead CMOS batteries, are there different types depending on the mobo? or are all of them basically the same?

A:CMOS battery replacement

Hello and welcome to Techspot.

The CR2032 Coin Cell Battery is the most widely used, but isn`t the only design available.

Look HERE for some different types of batteries.

Your mobo manual should tell you which type of battery to use with your mobo.

Regards Howard :wave: :wave:
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My PC is about - years old and I would like to change the CMOS battery on the motherboard before it Battery CMOS Replacement fails instead of after it CMOS Battery Replacement fails My CMOS Battery Replacement question pertains to finding out if I can change the battery with the PC quot On quot so I don t lose my BIOS settings Can anyone tell me if the motherboard powers the CMOS without the battery in the clip as long as the PC is quot On quot In other words if I have the PC quot On quot and remove the CMOS battery will I still lose the BIOS CMOS Battery Replacement settings because no voltage would be going to the CMOS chip Or is voltage supplied to the CMOS even without the battery as long as the PC is quot On quot My motherboard is an ABIT AT MAX VIA KT - Another thing I thought about doing was changing the battery with the PC quot Off quot but feeding volts to the battery clips to keep voltage on the CMOS as I remove the old battery and install the new battery This is what many auto dealers shops do when changing a car battery so the car s radio doesn t lose its channel settings and theft code This would be done by clipping leads from a spare CMOS battery to the battery holder which would supply volts in parallel with the old battery prior to removal and during the few seconds before a new battery can be installed Any thoughts on this Also does anyone know which battery my motherboard takes It looks like a CR but I m not absolutely sure Confirmation would be helpful Thanks nbsp

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i have a 486 with a dead cmos battery. i have several new batteries of the rectangular, removable type (stuck in there with velcro), but this one is soldered in. is it possible to plug in a rectangular one and just leave the dead, soldered-in one there? thanks!

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Tried to replace my cmos battery with one i bought from Asda ( lithium cr2032 3v)

Maybe i am doing something wrong ;but restarting the pc gave a beeping sound, so i replaced the original battery and the pc started ok except the date and time seemed to have reverted back to the date it was made.

Could this be a battery compatibility (they are both lithium cr2032) ?

Must admit its the first time i've changed a cmos battery in all the pc's i've had

pc is a Hp md8070uk media centre which is about 4y old now.

any ideas what's happening?

Regards Roy

A:cmos battery replacement

Welcome rsinbad to the forums.

Whenever the battery is removed from a motherboard, the bios resets itself to the default time,date and other options. You need to go into your bios and set the date and make sure that all the settings are what you want them to be. Some have an option, after you have set the date and time to setup for maximum performance or you can leave the other settings to their default.

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I get a Date & Time not set error on boot up, and have to press F1 to login, where I then have to reset the time manually. The fix appears to be that the CMOS battery needs to be replaced, but what type/size of battery is fitted to this model? I don't want to open the computer up more than once, so don't want to have to do this just to check the battery model. Thanks David
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Hi guys,

I'm new on forum procedure, so please bear with me if this is in the wrong place.

My desktop is a predator from Power Computing running an AMD dual core 3,800 2.01 GHz on a Asus A8N-VM CSM motherboard 960 MB RAM.
The software is XP Home with SP3.

I replaced the CMOS battery recently because it had run down. Everything went smoothly,I rechecked the bios, everything ok. the computer booted up and started ok, but with one exception; I had lost the post screen.

Normally, when the system boots it presents the post screen options on the monitor, but now it starts with a splash-screen from Asus, The Asus screen gives the option to press del or F8, I feel this is an unwanted intrusion, but I don't know how to get rid of it and return to my normal post screen.

Any suggestions out there?


A:Problem after CMOS battery replacement

Typically...there is an option in the CMOS settings...something called "quick boot" or whatever...that determines whether you see the POST check or not. Take a look at your current BIOS settings.

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I Have A Rather Old Pc Chips Motherboard With Replacement [SOLVED] Cmos Battery A Dead Cmos Battery I Am Told That The Battery Cannot Be Replaced As It Is Soldered To The Board And Besides That Is No Longer Available However My Local Computer Shop Has Advised Me That The Designers Of The Board Were Aware Of This Problem And Left Access To The Battery Via Pins Which Protrude From The Board I Have Assembled A Volt Battery Replacement x Batteries In A Caddy But Am Now Stuck As To Which Pins To Connect To There Are Four Pins All In A Row In Such A Way That A Plug Could Be Connected To Them Once Again My Local Computer Shop [SOLVED] Cmos Battery Replacement Have Advised Me That It Is The Two Outer Pins Which Should Be Used But I Do Not Know The Polarity Can [SOLVED] Cmos Battery Replacement Anyone Advise The Motherboard Is TX PRO PCI Chipset PC C TX NC Es I Have Enclosed A Photograph Of My Dilemma Any Help On This Matter Would Be Greatly Appreciated Thanks nbsp

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My CMOS battery is dead, can anyone advise where I can buy a replacement from one.



A:Replacement CMOS battery for Equium L40


I?m afraid the RTC battery is soldered to the motherboard. Don?t think you could remove it easily.

What you can do is to charge the battery.
In order to charge the RTC battery successfully, the main battery and AC adaptor have to be connected to the notebook. Additionally the notebook has to be powered ON for about 18-20 hours.

By the way: it?s a NiMH RTC battery supports 3V output voltage and 14mAh capacity
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I have an old computer, and I figured while I'm replacing certain things, why not put in a new battery for the CMOS. Is there anything I should consider before I do so?

The way I see it, the little 3 volt battery has been bleeding power for years and years, and if I replace it, I'll basically for all intents and purposes never have to worry about it again.
And no, there aren't any problems with my CMOS (that I know of), but I like to keep things in tip-top shape if I can. Besides, Murphy's law states that as soon as I close everything up, the battery will finally fail.

Any pertinent input in much appreciated.

A:Any complications with CMOS battery replacement?

I did it to any machine more than 3 years old that came into my shop. Just standard maintenance and wrote the date of replacement on the batt.
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I read the post regarding getting in without replacing the cmos battery but I can't even change the system date and time when I get into BIOS. First question is, how do I change the date and time (maybe I'm not doing something correctly).  Then I'll try the rest of the steps in the post mentioned above. Second, what kind of cmos battery is in a Thinkpad A22p 2629-UTU?  Is it the same CR2032 watch battery? Any help will be appreciated.  I'm trying to help an office in converting their WordPerfect docs to Word and from past experience, I know I need Windows 2000, WordPerfect 9, and Word 2000, which is on the Thinkpad. Aloha.

Go to Solution.

A:cmos battery for Thinkpad A22p 2629-UTU

Hello and welcome,
As to #2: it's probably a 2032 or equivalent, but in an insulating sleeve and with a specific connector on a pigtail.  As an example:
CMOS Battery for IBM Thinkpad 02K6541 and 02K6572
(I haven't verified that this is the right one - please double check)
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Can someone tell me how to replace the CMOS battery in my IBM ThinkPad T21?


A:Solved: IBM ThinkPad T21 CMOS battery replacment

Marking solved, found the information on the IBM web site.

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I recently changed my graphics card. While the card was out, I decided to change out the original year 2007 battery. I had no CMOS problems before, but I thought that since the battery was over 5 years old and buried under the graphics card I should change it. Now I get a checksum error telling me that it will reset to the defaults. Is there a driver that I should have installed? The error does not occur at every restart, only when I unplug the computer. I checked the voltage of the new battery and it is good (3.2 volts). There are no problems at all with my computer, unless I unplug it.

Dell Inspiron 530, Windows XP Pro SP3

A:CMOS checksum eror after battery replacement

A graphics card replaced along with the CMOS battery replaced would trigger the hardware reset only once.
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Recently....every time I turn on my laptop I get 5 beeps and the clock and date needs resetting. I think it's the internal battery that has probably gone flat.
Is a battery replacement going to mean me having to take the computer to bits to get to the battery? Any other tips that anyone has to get to the battery or anything to stops the beeps!
Many thanks indeed.

A:Inspiron N7110 CMOS battery replacement?

Usually a faulty CMOS battery won't produce beeps -- a faulty clock chip, however, will.  Run the Dell diagnostics on the system (F12 at powerup).  If you see an error relating to a bad system clock chip, it's the mainboard that will need to be replaced.
The CMOS battery is not even used if you have a charged, main battery in the system or the AC adapter is plugged in.
Changing the CMOS battery requires quite a bit of tear-down (removing the system board):
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I "inherited" an NEC Versa laptop, model 4230. We finally got it up and running but I think we need to replace the CMOS button battery (I get a "System battery is dead" error message). I have the right size/current/voltage battery but cannot access the board. I realize I may have to solder leads on the battery to secure it properly to the board. Is there a special NEC tool to take this cartridge/mother board out? There is a lock/unlock icon next to a small hole of this cartridge. All of the other cartridges do not have this oval shaped hole. What shape is the tool? How can I change my battery w/out getting to this board?

Thanks in advance,
PamK in San Jose, CA

A:replacement of CMOS battery in NEC Versa laptop

The "lock/unlock" symbol next to an "oval hole" sounds very much like the standard Kensington Lock provision on a laptop.

This is for attaching a locking cable to lock the PC to a desk, and prevent theft. Its not a lock to get access internally for the laptop.

The "system battery" will be the little button cell or similar that is located on the motherboard of the laptop, probably deep within the internals.

Taking a laptop apart (and getting it back together) without damaging the laptop can be a complex and difficult operation, and you really need the full service manual to find out how its done for that model. I would suggest taking it to a shop.
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I would like instructions for replacing the CMOS battery in my Fujitsu C340 laptop computer. I kinow it is a small, round battery with two legs on it. Thanks in advance.

I have no idea where it is located either. I've looked under the keyboard but didn't see it. The only opening on the back is the battery door (plate).
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Hi Everyone,

I have a Portege M750 Model PPM75A-007010 and I need to change the CMOS (RTC) battery.

Can anyone share with me
- where to find this battery
- is this the normal round battery and if you can tell me the battery number?
- or where can I purchase this battery and price range?


A:Portege M750 - CMOS (RTC) Battery replacement


Normally the RTC batteries in these models are rechargeable.
If not yet done, please let the unit run overnight (not off, not hibernated, not standby - but ON) and see if the issue is resolved.

I think the charge-description/characeristics of the RTC battery is mentioned in your users manual.

BR Tom
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I went to a client's home today to replace the CMOS battery in her old Dell XP machine. Should have been a 15 minute job tops. When i rebooted the computer all was fine,but could not get online. I looked at the clock(lower right hand corner) because everytime I opened the browser(any Browser) I got an error message saying to set the clock. Well-I did,I thought. Reset the BIOS to default,and still no internet connection.
After about 30 minutes of trying to figure out what was wrong,I looked at the clock again-and it was set to the wrong year. Reset the clock and BANG! everything worked perfectly! I know it's been a while since I worked on an XP machine- but I don't ever remember that happening or why?????

A:XP CMOS battery replacement- clock setting heads up!

Large time discrepancies can flag things like security issues, so it's probably going to be down to something like this rather than anything in XP itself.
For example if you have an internet security suite that does look-ahead to destination websites, all the security certificates can seem to be invalid if the system date is way off.
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I am readying an old PC I built Cyrix Mhz CMOS/Checksum replacement continues after error battery to give to a brother who has never had or tried a computer but is expressing some curiosity Long story short I discovered several issues when I powered up this PC to ready it for a car ride to Florida that is leaving soon CMOS battery Checksum error removed old battery I also removed a non functioning primary slave Seagate HD Installed new battery On reboot HD was not detected auto and user defined HD did not work system kept reverting to date CMOS Checksum errors continue despite new battery Also moved jumper on HD to reflect single drive CMOS/Checksum error continues after battery replacement status Swapped power supply from CD to primary master HD Western Digital resulting in HD being detected Used a different power supply cable for CD resulting in CD but no HD Removed jumper from HD completely and tried a rd source for power to CD which worked HD and CD detected continued CMOS Checksum errors mean Plug and Play enabling in CMOS is not being retained and must be enabled through setup to continue booting AND with the cover off and the tight fit of swapping things in a desktop I also noticed that the CMOS/Checksum error continues after battery replacement CPU fan is not spinning I am not sure when this happened I was feeling heat on my hand all along as I manipulated cables Good thing the cover is off This fan is attached to the power cable I have attached to HD which meanes that it used to be piggybacking off CD drive not HD My motherboard manual FIC PA- indicates that the CPU fan can be powered at a pin connector on board to the left of CPU CMOS Checksum Any ideas on how to resolve this issue I can t send a newbie a PC that needs CMOS tweaking everytime it boots up My bios is Award Thanks Susan nbsp

A:CMOS/Checksum error continues after battery replacement

Sounds quite confusing all the things you tried.

Checklist ...

1. Is the replacement battery *fresh* (3 volts for CR2032)?
2. Reset CMOS (via jumper).
3. Go through all bios settings and check they are suitable.
a) Try selecting LOAD BIOS DEFAULTS setting first.
b) PnP Configuration Setup\Reset Configuration Data
- Set this to 'Enabled'.
4. Try reseating all components and connections.

If all else fails then its perhaps the mainboard could have been damaged by 'static' if adequate precausions were'nt taken while working on it.:blush:
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Hi My friends laptop - an S - - has been having some problems I've replaced a few parts on it before notably a cracked screen with no problems However it started to refuse to boot saying 'CMOS Battery Failure Press F to enter setup' Of course you would do this set the date and time save amp restart only to get the same message We replaced the CMOS battery with one with the same serial number and now the laptop will not start It does one of two things It either a appears to turn on spins up the disk amp CD drive cooling fan goes to then flashes the POWER ON led once green then twice orange at second intervals with no response from LCD or keyboard Or b turns on spins up disk does not spin up cooling fan POWER ON light stays steady no response from LCD or Keyboard I've re-assembled the laptop several times amp cannot find any missing connections or obvious signs of damage The only thing I can think of is somehow the mainboard got damaged - finding replacements is tricky Any ideas

A:Satellite Pro S300-120 won't start after CMOS battery replacement


>It either a) appears to turn on, spins up the disk & CD drive, cooling fan goes to 100%, then flashes the

POWER ON led once green then twice orange, at 1/2 second intervals, with no response from LCD or keyboard.
Usually if the power voltage in abnormal of the power supply malfunctions the DC IN LED will flashes orange.

So in my opinion it looks like a problem with the motherboard :(
Possibly you will need to replace the mobo ;(
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Pls Help I have the mobo CMOS/Checksum battery continues error P4B533: replacement after P B I formatted the HD reinstalled XP and updated everything INCLUDING BIOS using ASUS update P4B533: CMOS/Checksum error continues after battery replacement program it wasn t sucessful but I didn t realize it until I restart the comp then problem happens I have the CMOS Checksum error so I searched on the forum I took out the batt then short the pins at CLRTC but didn t work then I got the Driver Free Disk For Bios Flashing from bootdisk com downloaded the AFLASH software and the latest BIOS from asus socket -- gt P B -- gt awd put the files into the floopy ran it then it came to the point that i have to type the filename and path which is supposed to be A XXX-XX XXX then I m stuck here I m thinking since the filename I have for the BIOS is awd I can t make the path exactly like A XXX-XX XXX how does the path quot A XXX-XX XXX quot work any inputs would be appreciated thanks Walt nbsp
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After my friend's laptop wouldn't run on battery power OR charge the battery I tried many "fixes."
Shockingly none worked that I found.
Only one thing worked for me to my surprise.
A last ditch effort was to open up the laptop (sony pcg-81114L) and disconnect the cmos battery for a few minutes to reset the CMOS.
To my surprise, when powered on, the battery instantly showed it was charging AND when removing the power plug the battery POWERS the laptop now! (and I'd thought I was wasting my time.)
Worked with an off brand battery also.
Many times this has saved many computers that have odd "unsolvable" things wrong with them.
Surely someone else has done this also but I haven't seen it posted anywhere to my knowledge.
Thank GOD for bringing the idea to remembrance!

A:sony vaio won't charge battery or run on battery power (CMOS BATTERY FIX!)

Hi askfault,
Do you have any information on how this fixes the battery problem? would be interested to know.
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I have just replaced my CMOS/BIOS battery today, as , I have faced some critical problem regarding regular BIOS date/time reset after system shutdown. But I want to know how do i recognize, that my new batter is totally ok or functional.

Battery Meter gadget shows that "battery Not charging"
Is it a gadget problem?

Is there any method available so that I can track that my new installed CMOS battery in PC is working fine?

Please help me.

A:Battery Meter shows CMOS battery not charging

The battery you have replaced is solely there to maintain the clock and other BIOS settings (if you have changed them from their defaults). It will not prevent you from booting your system if it is dead/missing; all it means is that you will have to enter the BIOS each time and make the correct settings and time. This battery is not rechargeable.

Do you still have to enter the correct time, or is the BIOS maintaining this now you've changed the battery?
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Been working fine until a few days ago. When I turn it on it says 163 - Time and Date not set - There is no option in bios to set date Non-System disk or disk error replace and strike any key when ready - Bios cannot detect hard drive So the question is if the RTC Battery is weak or dead can it cause above issues Thanks Chris
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My desktop PC has a 3 volt lithium coin battery on the mother board. The battery was mfg by toshiba and has the number CR2062. I can't find an exact replacement. Is there a generic equivalent that I can safely use?

A:need cmos battey replacement

kramredarts said:

My desktop PC has a 3 volt lithium coin battery on the mother board. The battery was mfg by toshiba and has the number CR2062. I can't find an exact replacement. Is there a generic equivalent that I can safely use?Click to expand...

Yes you can use those energizer lithiums 3V.Just replaced one accually!
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Hi there

It is great to know this place.
I had a old laptop from my company's storage room, it is IBM ThinkPad type 2628. there is coms password set up. every time turn it on, you are asked to put in password. however, the password has been forgotten by the IT people. so I am locked out.

I tried to unplug the motherboard battery, then restart the laptop. I still got asked to enter password.

anyone can help me on this?

thanks in advance.

A:IBM ThinkPAD 2628-Cmos P/w Lost, Help!!

Im not too sure if they have this on laptops, but on most desktop motherboard there is a jumper which will reset everything in your bios.

Its similar to the one found on hard drivers, just move the jumper over and it should reset everything including the password. Couldnt tell you where to find it or even if there is one though. Sorry.
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View Solution.

A:CMOS battery

Hi, Yes, they are all the same 3V CR2032 which you can buy from many shops for few dollars. Regards.
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i have an acer extensa 5620z which could only power on in few seconds then goes back off ,i did some research and i discovered that it was the cmos battery that was dead so i change hopping that every was going to be fine . when i plug the adaptor in to a power extension, first the pc came on automatically and when i shut it down to and couple it ,it could not come on i discovered that each time i remove the cmos battery and put it back the machine will power on but once i shut it down and couple it will not come on even to show a light .so i dont know if there is a configuration that i need to do please help me

A:cmos battery

Hi and Welcome to TSF!

A dying CMOS battery shouldn't prevent booting. A dying power supply or battery on the other hand might.
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A:Cmos battery?

Anyone here who knows the location of cmos batt of lenovo ideapad y530.
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Question. In the motherboard manual it says to use a flat screwdriver to pry the cmos battery to change it. Well, I was doing that and the cmos battery sparked. First question is, what tool do you guys recemend. So, the motherboard cmos holder doesn't break, and so it doesn't spark again?
Second, is a spark from a 3v cmos battery harmfull to me, if it came up the screwdriver? I don't even know if it did, but I was a little freaked out by the spark, because it didn't say anything about it possibly happening. Of course, the pc was not plugged into a wall or anything. It, was just the battery itself.

Thanks everyone

A:Cmos 3v battery

Probably ran into a residual charge on the power supply.
Want to make sure not to short the 2 battery contacts or
short it to any metal on the case.
You can usually discharge a lot of that by pressing the power
button with the power supply turned off or unplugged.
The battery holder should have metal clips on one side.
Press on the opposite side of the battery to push it against the clips
then lift it out.
The clips are spring loaded to hold it in.
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Well im about to take out my CMOS battery and need to know if it will reset everything that ive downloaded or just my bioes settings will it reset my password for the admin?

If i remove the CMOS battery will it clear everything like a reformat?

A:CMOS battery

Clearing the CMOS will only clear your BIOS settings like Boot order, CPU settings, stuff like that. It will not format anything, nor will it reset any passwords. Even if it is a bios password, most manufacturers make sure that it is a little harder then that to clear the password. If you have forgotten your password for windows it will not effect that but there are ways to do that.
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I need to replace the CMOS battery.  What battery number, e.g. 2302, or part number am I looking for? Thank you.

A:CMOS battery

Hi: You would replace the CMOS battery with the CR2032 3V battery. You can get that battery almost at any store.
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Laptop is over seven yers old and is giving messages suggesting CMOS battery needs replacing. Considering it's age what would the battery look like. I have no mannual. I havn't got to see the whole motherbourd yet but can see this much. Is it there?


A:can you see cmos battery

Make and model may help someone to help you...
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I have a ASUS motherboard.When my Pc star to bootup,I have a line in the end that tall me that the Cmos Batt is lower and the date and time is not accurate or something like that.What kind the battery is this one and what do I have to do to change?



A:Cmos Battery

The most commonly used battery is CR2032. If you still have the P4S800-MX motherboard (from a May post), turn off your PC and remove the left side cover. The battery is a 5 cent coin size disk near your IDE drive connectors.

You can get the battery about anywhere (I saw them at the grocery store last week).
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Any different idea(s) on why it looses time ?

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A:Bad CMOS battery

Does it do this on every boot up? Have you tried going F2, after your in the bios hit F10 (should prompt you to SAVE, if not, then exit and save) If it continues to do this then yes, you will need to replace the CMOS battery and hope that it is just the battery and not where it sits.
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would it be a bad idea to replace the cmos battery in a desktop computer while it is powered on? i want to do this because it would prevent the loss of any information such as system time and some bios settings (boot sequence).

A:CMOS Battery

Yes.....a Bad Idea.......
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I recently had a major computer crash following a lightning storm and a lengthy power failure. I feared the worst and called out a tech. It turned out that the CMOS battery was dead and when the power had failed, the CMOS settings were lost.

The tech said that under normal circumstances, as long as the computer was connect to the power supply, the settings were retained but when the power failed, the settings went.

So if I just use system shut down on the computer at night, there is obviously power still getting to the computer. However I assume if if I actually turn off the computer on/off switch then there will be no power getting through and the CMOS battery takes over.

If I do that every time I turn off the compueter I assume that the CMOS battery will not last as long.

Am I correct?

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Hi guys My computer just started having this problem since Christmas I ve had this mobo since and this is the first time when I switch on the comp it gives me thsese messages randomly quot CMOS CMOS battery low, help? battery low quot quot Error loading drive A quot quot Error boot sequence quot quot Press F to continue or F to enter setup quot I went into the BIOS and it is always set at factory default settings even when I attempt to change them to the previous settings I had It gives me a message that says that because the CMOS battery is low my date and time and other BIOS settings will be reset to default then gives me the error boot sequence msg and still continues to load windows and desktop is messed up a bit but otherwise quot normal quot except for the sys tray that s missing icons I have never really encountered this situation before but the solution seems straightforward replace the CMOS battery only that I CMOS battery low, help? don t know where to find it I ve tried tigerdirect ca newegg ca and even a local computer store but they don t have it on their website My mobo is an CMOS battery low, help? OEM Lenovo J - ASUS M A-VM with a G chipset amp AM socket What additional details do you need to know what CMOS battery I need to buy and if possible any websites I can go to in order to find it preferrably CMOS battery low, help? Canadian due to shipping costs but I don t mind US Also my OS is win RC although that might not be relevant I really appreciate any help you can provide nbsp

A:CMOS battery low, help?

CMOS batteries are almost always CR 2032 basically a button battery taht is a available in most big box stores or electronic store. Take the side of the case off and see if you can locate
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my system clock slows down if I shutdown system. is it b'coz of my cmos battery is being low?
How do I find whether my system has a cmos battery?How will I know what type, who is the maker etc? How do I know whether it is getting low?can u suggest some softwares that check it? I am rather naive with hardware and has opened the motherboard only to clean it.My PC is 4 yrs old. Is there any problem if I don't change it other than system clock becoming low.If it is necessary to change cmos battery how much does it cost in rupees?

A:is cmos battery getting low

When you open your case you will see the CMOS battery on the motherboard. It resembles a watch battery. It is flat and round and looks almost a like a button. Just pop the battery out and off to Radio Shack or any other place that sells batteries for watches and other electronic devices. The first sign of a faulty CMOS battery is the system clock changing and not displaying or retaining the correct time.

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could someone tell me where the cmos batter is in a dell inspiron 3800

A:cmos battery

Welcome to TechSpot! Hope you'll love this place as much as I do.

If you haven't already done it, then open up your case and look around on the motherboard for a shiny round thing that's about 1.5cm in diameter, pull it out off it's socket and there you go.
It should be near your PCI-ports or near your CMOS-jumper.
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I have a Compaq Presario 7360 Desktop PC and I am not sure what kind of cmos battery it needs to be replaced with. Can someone please help me out with this. Also, how much do they cost. Thanks in advance.

A:CMOS battery

unplug the PC, even the power cord at the back
ground yourself (ie touch metal, discharge static)
open the case and point a flashlight at it
carefully pry it out, usually a clip you GENTLY pull back to allow the battery to pop out
(you do NOT want to break the clip off)

any radio shack or pc store will have them

about $5
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Want to change my CMOS battery....what will I lose while it's out ? What will I have to reset other than the time and date ?KENNY

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Is there a default in set up after replacing the cmos battery or should you take a picture with the flash off just in case?
I cannot think of any other way to know the information as print screen etc cannot be used.

A:cmos battery

Replacing the CMOS battery will probably reset the BIOS settings to their defaults. Unless you or someone else has changed the settings, that will be the same as what you have now.

You could use a camera (or smartphone) with the flash turned off to record the settings. Or, you could just use pencil and paper. (Dell typically provides a fairly limited selection of settings. That's not intended as criticism.)
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I do not see a Cmos battery obviously its there somewhere, If it doesn't look like a large watch battery what else does it look like, I see nothing that can be popped off and replaced.

A:Cmos Battery??

Some older motherboards had a barrel shaped, blue backup battery soldered to the motherboard. That was common with 486 systems. In order to replace it, you were required to attach an external battery to a specific connector on the motherboard and set a jumper (maybe) to disable the original battery.
Another possibility is a CMOS ram chip with the battery built into it. Those usually were a large black chip plugged into a socket on the motherboard with "DALLAS SEMICONDUCTOR" printed on it.
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Hi can someone help please I need to replace the CMOS battery in my laptop but have not had any look purchasing one all local retailers say they dont stock them even the one where I purcased the laptop from, I did get one from Amazon which said it was the correct one but when I recieved it it was a slightly different end to the cable so can someone advise please. The model is HP G62 Notebook & the battery is a CR2032HF-243V. Thanks Normski.

A:CMOS Battery

Norm. To better help you we would need the exact model number or product number of your laptop/desktop??? REO
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CMOS battery

What happens and what is the danger to your computer if the CMOS battery dies?

A:CMOS battery

The CMOS battery is a very low powered device, just like a little watch battery.

So don't stress, it ain't gonna kill you.

However, its needed to keep data in the CMOS. The CMOS tells the computer what processor is installed (although many computers have jumpers set to tell it this), what drives you have (diskette, hard disk, CD-ROM, and others, and importantly your hard drive's geometry), how much memory is installed, and other important data that your computer needs to know in order to run correctly....

I imagine what would happen if it completely ran out would be that the CMOS would have to be re-written to manually in your BIOS program every time the machine was powered on for anything like normal operating to occur. Certainly you would loose the time settings and would have to redirect the BIOS to redetect the hard drives everytime you powered on.

You can replace a CMOS battery quickly and easily. They are very cheap and just clip out and in to the motherboard. It resembles a small silver disc about the size of a coin.

This is assuming that your computer is not totally ancient (like a 8088, 8086, maybe 286 or something) where the CMOS battery was sometimes not removable. If this is the case then get a new computer you sad man..... Otherwise, it will cost you nothing to replace and if you are not sure of yourself a computer store will do it in about 1 minute.
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I have a 486 mother board. When I boot up into DOS I get a message saying, CMOS BATTERY LOW. How do I replace it.

A:CMOS Battery

Crack the case open and look for it. THe older ones on 386 and 486 motherboards were some times integrated into the BIOS so you might be out of luck. Others had a small black pack that looked like 4 AAA batteries connected together and a red/black set of wires running to the can still get those.
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What happen when I put cmos battery in motherboard dell 745 it cannot start!!!its new battery...anyone to help me please?

A:Cmos battery

Check and make sure the battery seated correctly. Also make sure you did not jar your memory loose. This will prevent . The computer from booting also.
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I Have an old 166 Pentiun computer with a i430vx mainboard. My problem is that the CMOS battery is dying and from what I could find on the net, it is enclosed in a discontinued Houston Tech HT12888A RTC chip. Some of the info on the internet says that you can open the chip and change the battery though it may be soldered in place and other sources say to replace the motherboard. Also will an add in card containing a clock also power the CMOS. I leave the computer on all the time and it runs fine but when I shut it down and reboot I lose time and have started getting a checksum error/CMOS battery failed message. I have another computer and would like to give this to my son and would hate to scrap a good machine for a $3.00 battery. Any info on this problem would be greatly appriciated.

A:CMOS Battery

Well I could understand not wanting to scrap the system due to a battery. There are several options you could look in to. 1. you could purchase a new mother board( for under $100) install it and actually have expansion room for later, or 2. You could scrap the system and keep it to use its parts as test parts or replacement parts for another computer. If it was me that faced this problem I'd look at a new motherboard first maybe you could even find a good used one.
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Ive been working on this old computer and it had a bad CMOS battery. It was the kind where you put AA's into it and then it plugged into the motherboard. I replaced it, but now the hard drive settings are all screwed up. I went into the Bios Program to set everything. But none of the options matches the hard drive. I know for a fact that this computer worked before the cmos battery went dead. The options in BIOS you can only set to
Type 1, Type2, etc. There is no "USER" setting where you can just put in the numbers of heads/cylinders/sectors. What should i do?

A:CMOS battery

If you have no user or auto settings try setting the bios to type one. Hopefully the drive was originally using a drive overlay and will boot ok with this setting.
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I just tried to install a new battery and broke the spring clip part of the socket. Is there a remedy? TIA, Brian

A:Cmos Battery

Unfortunately there really is no easy repair for this. It would require desoldering the old battery socket and soldering a new one in. While this is not rocket science, it does take great care and some skill to do. A minor slip or laving the soldering iron in place too long can do some real damage to a motherboard. It is best left to a technicial with the proper equipment and skill to do. I would consult your local computer shop about this repair. And it may take a referal to someone else.
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I need to know which way the wires (2 of them total) go on my compaq armada 7770dmt. While replacing the cmos battery I got the wires mixed up when I put the plastic end on. Since the plastic piece only fits one way I know that it must matter which way the wires are attaached. The colors of the wires are red and white. I cannot find a schematic for the motherboard.

A:cmos battery

i cant find anything on the HP website
you may want to post the question in the support forum
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It's time to change the battery (first time for a machine I bought in 2004 - not a bad run). I can't get the old one out....any suggestions?

A:CMOS Battery

On side should have a metal contact.
You need to carefully pry it toward that contact as it is spring loaded,
then lift from the other side.
Should pop right out.
Be careful you don't want to break the socket.
Some older cmos batteries were soldered on,but I haven't
seen that since around 2000.
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My CPU clock was messing up constintly on my so I wanted to change out the battery. I did that with no difficulty. When I restarted my computer all that happined was that it beeped at me the code was.. 2 quick then 9. My computer is know a fancy paper weight I can't even boot from a disk, cd or floppy)There is no signal going to the monitor I have a Matsonic Ms6260s motherboard.

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I was having a problem with the computer keeping time while it was shutoff. I installed a new cmos battery and the time is still not keeping when powered off. Any suggestions.

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Question Battery.... perhaps CMOS ? Does anyone know if a quot faulty quot CMOS Battery.... perhaps ? CMOS battery the CR type can stop a laptop working This is the sequence of events - Booted laptop from CMOS Battery.... perhaps ? standby as normal Logged in Everything working as usual for about minutes Then I stopped working on the laptop to talk to someone While we were talking I noticed the laptop screen suddenly went blank From that moment forth the little darling has been as dead as the Christmas turkey My experience with CMOS batteries that are about to go play a harp is that they indicate this by displaying the wrong date and time Even then it can take days or even weeks before CMOS Battery.... perhaps ? the battery finally gives up I used my last CR a few days ago so before I go trundling down to the shops I would be grateful if anyone could tell me if a quot deceased quot CR can make a laptop suddenly die I haven t seen that before TiA T nbsp

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Hi everyone,
I have an NEC Versa 4230, with win95,133mhz notebook. When I turn it on it tells me the system battery is dead, and to replace it. Thing is I don't know where it is at or where to get one. Do places like circuit city sell them. Any help would be greatly appreciated. Thanks , JOE

A:cmos battery

Well I looked it up a NEC and the bad news is they say must be replaced by certified NEC site.

Either they just want to charge the money or it's not easy to do.

Could be soldered to motherboard instead of clip type which is a major pain.

Sorry, don't have any better info for you
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I have a cracked 14.1" LCD for an IBM ThinkPad T30. I have two questions:

1.) Where can I find a reasonably priced, properly working replacement?
2.) Current resolution is 1024x768. Can I buy a 1400x1050 and put it in? What else would I need to update if it did that (drivers and/or video card)?

Thanks in advance.

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I have to replace the battery on a toshiba L355-S7915 laptop. Which battery is better? The Toshiba battery or the B-5040H from battery-biz. anyone use battery biz?

A:Battery Replacement Toshiba OEM or Battery-Biz

Could you provide links?
I think with batteries the big thing is Watt/Hours. (Don't quote me on that tho)
You might be better off using the same battery as the one you had before, simply for the sake of reliability.
It also will depend on what you use this laptop for.
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Howdy Friends & Neighbors,

My Sis just picked up a used Packard Bell w/W95. She asked me if I'd help her install 98. I said "of course". I started it up, and it seemed to go through at least a partial setup (running the memory, and that sort of stuff), but then it went to a prompt asking for a password. CMOS password? This is what I believe it wants. I've tried the "bell9,bios,cmos" etc..... nothing will get me passed this stage... Now .... If I remove the CMOS battery to dissolve whatever password was there... will the master cd restore it, or would there be a problem with the BIOS/CMOS at all?

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I have an Abit-Mobo and I need a CMOS battery for it. However, I can't find it in the stores, so I ask if anybody on the board knows where I can get one online?

Thank You

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I have an interesting problem.
During POST my Sony PCV-V200G desktop gives me a message "ESCD updated Successfully".
I have not changed or added any hardware. Have not changed any BIOS settings.
This message just keeps appearing every time I boot or reboot.
I've reset my bios back to default settings and the message still appears.

I'm thinking my CMOS battery is dying .

Make any sense to anyone out there ?


A:CMOS battery failing ?

It shouldn't be anything to worry about unless something isn't working. It likely has to do with pnp in the bios or a usb device.

All the cmos battery does is save your bios settings, so if you change a setting you can save it, rather than making the same change every time you start the pc.
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If the Battery on the MB dies, will that cause the computer not to boot up?
Situation is: I am trying to fix a computer to replace one on our machines here at work. The only one we have to replace it with is an old 75mhz POS model. (which is just fine for a simple DOS based program) I was told that the CMOS battery was not working properly. I went to turn the computer on and nothing happened. I opened the case and made sure all the cables and power was attached properly (which they were). You can hear the power supply fan come on so it's getting power, but there is no POST or anything. Could a dead battery cause that? If not, what else should I try?

Thanks in advance.

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A few days ago my PC battery CMOS dying? started making really annoying grinding noises CMOS battery dying? I restarted my computer and it said that I had a CMOS checksum error and my computer fans started going really fast and then slowing back down to their normal speed The red computer light on the front is barely blinking at all I guess I need a new CMOS battery But my question is the processing grinding noise I m hearing does that have to do with the CMOS battery dying It started at the same time as when I started getting these errors but I haven t found any information on irregular noises that correlate with a battery dying I don t get what could be making the noise because it s a processing kind of noise not really a fan I m pretty sure it s not the hard drive Also will it damage my computer at all if I can t get the battery replaced right away I m obviously running it with a dying battery right now help nbsp

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Got a Pentium mmx 166mhz on win95, 2 gig with a failing cmos battery. Anyone have any idea what type of battery it needs? Radioshack told me over the phone they have two types. Any help would be appreciated.

A:what type cmos battery?

panasonic 2032 usually but not always, best thing is to look at the one you have.
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Hi guys. I have recently been given a laptop (Acer Extensa 501t) and yesterday it informed me that the CMOS battery was bad. I did a little poking around on the net and found a service manual to tell me how to pull this thing apart.
So I pulled it apart to replace the battery. All went well until I broke part of the battery holder. But the part I broke could (sort of) be held in place by a little bit of metal (battery connector?).
Anyway, I proceeded with replacing the battery and put everything back together and it all worked well, I reset the time etc and used the internet via usb. But when I turned the laptop off and restarted, it again told me that the CMOS battery was bad.
Question is can I glue the broken part down to the motherboard and what glue can I use?

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Hi My mum has been having problems with her Battery? CMOS Solved: computer for a few months and I am just wondering whether it may need a new cmos battery The first problem was a regular BSOD which said there was a registry error and to Solved: CMOS Battery? check new hardware software was properly installed that s all I can remember Also the sound card drivers seem to have stopped working and despite re-installing them the sound still appears not to be working I heard that when the cmos battery is low hardware drivers can stop working so thought this might be revalent The main thing which suggests to me that it might be the battery is that the time is always wrong but more recently it has begun to take hours to start up blank screen for ages before booting I ve never come across this problem before but it sounds to me like it could be the battery What do you think Thanks in advance Jon nbsp

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So I have 2 audio recording rigs I built, one is maxed the the other I've been recording with for about 6months now. The maxed out rig has an Asus motherboard and the Comos battery is probably dead by now. It wont power on because of this. I need to replace it so badly but what Im wondering is will I lose the memory on it? I definetely assume that the harddrives are not affected by the battery but Im not 100 percent there.

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I've lost my CMOS battery for my sisters ASUS A8V-VM SE motherboard. Can i use any old clock battery or could someone tell me what type/ voltage etc.


A:Lost my CMOS battery

You need this:
CR2032 3VLithium CellCMOS Power
CR2032 3VLithium - Google Product Search
this is described in a pdf for the manual
ASUS A8V-VM manual - Google Search=
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I have a laptop vintage HPze CMOS Solved: Battery . . . and I was Solved: CMOS Battery . . . wondering how much life is left on the CMOS battery Is there a way to tell some monitoring software or something BTW I m NOT talking about the laptop battery which most monitoring software will read I m not having any trouble with the time and date and the POST is not giving me any warnings so it s OK now but I saw a thread recently that said the normal lifespan of those things is to years That was for a desktop but I m assuming it s around the same for a laptop if there s any difference whatsoever I have another laptop Winbook XL - vintage and the CMOS battery went out on that a few years ago It still will boot on AC Solved: CMOS Battery . . . Adapter but of course the BIOS info has to be re-entered every time in addition to the time and date Or at least it booted last time I tried but that was a couple of years ago maybe the CMOS battery still had a trickle cause I really don t know if these things will boot when the CMOS battery is completely gone will they I assume they will with the AC Adapter And BTW I wrote down all the CMOS settings before the WinBook CMOS went out I did it when I noticed the clock started to loose time which was a warning The AC Adapter will charge up the CMOS Battery but eventually it will go Now I do run this thing always with the AC Adaptor so maybe that s why the CMOS Battery is still alive because it s always being charged Anyway the reason I m asking this question is that I really don t like to crack the case on these laptops it s a lot easier to do on a desktop when all you have to do is remove the cover I have the manual for this thing but the design is such that all the guts MOBO CD DVD Display Heat Sink Fan etc have to be removed to get at the CMOS Battery And I don t know if the thing is soldered in or in a slot Getting to the CMOS Battery may be easy to do on a desktop but on a laptop unless you re mechanically inclined and I m NOT it s a bear And I ve never done that before I replaced the HDD one time but that s in a slide out tray and that took me several hours to do it should have taken only about minutes but as I said I m not mechanically inclined and I dropped those little tray screws on the carpet among other things If the CMOS Battery is about to go which I assume it is then I ll either take a look at the manual again or else just make an expensive boat anchor out of this thing and get another Of course even if I try to crack the case and get at the CMOS Battery I may end up making a boat anchor out of this thing anyway Questions in summary Is there monitoring software that will tell how much life is left in the CMOS Battery Can laptops boot with the AC Adapter when the CMOS Battery is dead TIA nbsp

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It's that time when the clock on my PC is starting to slip. Can I just pull the CMOS battery out and take it to a shop to buy a replacement, or is there more to it than that?
Thanks in advance.

PS - Oh ya, I'm wondering what people think of A+ certification. Is it worth the money and is it valued in the industry? Thanks again.

A:Replacing a CMOS battery

Turn off your system and umplug it. Then you can remove the battery to replace it. You can buy a replacemnt at any discount store. Usually just a calculator battery. I thinnd cr2032 is a standard cmos battery but dont quote me on that.
A+ is a good intro to training. It is actually a prerequisite to several other certification programs. I am A+ and had to be to get certified for other things and to work on certain types of equipment and not void the warranty.
Good Luck,
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How long does the average cmos battery last? Also what are the typical symptoms when the battery goes?

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heya battery CMOS problems ive been having problems with my CMOS battery problems cmos battery lately well at least thats what i think it is the problem starts whenever i unplug my CPU cable from my wall socket or whenever i switch off the socket whenever i load CMOS battery problems up my computer for the first time after i unplug my CPU cable before i reach windows a msg appears - gt CMOS settings not set - press F to load setup - press F to load default values so when i press F i enter setup and have to enter my date time again cos it was defaulted to am when i hit F i go straight to my windows login screen with my time and date defaulted ive tried countless of times removing and reseating my CMOS battery but it just keeps happening this only happens whenever i completely disconnect my CPU from the power supply if i just shut down my PC normally and load it up again everything works fine ive also replaced the CMOS battery with a new one but still the problem persists any help would be much appreciated nbsp

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I just changed my CMOS battery and now my computer screen is jumping all over the place, like the fine tuner is messed up! I wore a static wrap, rubber gloves and I turned off the computer. I even reset my date & Time, and checked my monitor cables to see if they were lose, but their OK. Any ideas on why my computer screen is jumping around? I even checked the battery to see if it was good, and cleaned the battery, it's OK! Please help!

A:Changed Cmos Battery

When you take out the motherboard battery for a length of time, the BIOS returns to default settings.
First, did you reset the date and time in the BIOS. Does your computer have onboard video or a video card? did it used to have onboard video, but you added a video card?
Also check you refresh rate in the monitor's properties
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Good Evening All,
Getting ready to change the board battery. Read the "How To" section, but might not be understanding. I went into set up mode to write down the BIOS settings, but not sure what I'm to be writing down. The only thing I see that refers to BIOS is the Core v6.0 and Revision 3.0 5/2002. Is there something I'm missing?
Thanks Much,

A:Changing the CMOS battery

There's no need to write down CMOS settings, that's an instruction that used to be necessary long ago.

When the battery is replaced properly, the CMOS defaults (designed to assure system boot) will take over.

Then you boot into the BIOS...set the data and time and save all changes...hit F10 or whatever to save the changes...and you should be good.

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Hi, my laptop is stuck at the BIOS screen requesting a password when none was assigned, i've troubleshooted this to be a manufacturing error and I need to short out the CMOS battery the model is a Toshiba satellite P205D-S7802. How can I get to it to short it out?

A:Need to short out the CMOS battery

Try searching the Toshiba support site for specific instructions for your motherboard on how to reset (not short out) the CMOS battery.

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I am hoping that some of you guys may have some information that may help me.
I need to replace the cmos battery in my CTX 700G laptop, but CTX stopped providing support for these a long time ago, and I have no way to get any sort of service manual for it.
the battery nust be well hidden because I cannot see it after removing the keyboard, and I do not want to dissassemble more than I have to in order to reach it.
Any help will be appreciated.

A:CTX laptop cmos battery

Welcome to TSG!

Not sure where it is but, this page shows a picture of what you are looking for. The green one part way down.
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My sister gave me her old laptop. I changed the CMOS battery. The display screen is not working. I have it plugged up to an external screen. It shows this "The firmware has detected that a CMOS battery failure occurred <f1> continue". I tried hitting f1 and nothing happens. I have tried f2 after pressing the power button but it won't let me change the time or date that way. I have heard people talking about resetting a jumper or shorting a circuit, but I have no clue how to do this. I have to do all this myself because I am flat broke so I can't pay anyone to do it for me. I have a Toshiba Satellite L655D-S5050. Any help would be GREATLY a appreciated.
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Everytime I boot up my mother's computer it displays this message:

CMOS battery low
checksum bad

She says she replaced the battery, and the message still keeps coming up. Any ideas as to what would be wrong? Thanks!!