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Solved: the CMOS battery for the BIOS general question

Q: Solved: the CMOS battery for the BIOS general question

If the CMOS battery for the BIOS becomes dead, and it is not replaced with a new battery, what are the not so good effects beyond the day and date system clock ? Will it keep the default BIOS settings in the CMOS for a long time without a good battery ? I did replace my 2006 Gateway battery mainly for the day/ date and to be able to change boot device order.

Preferred Solution: Solved: the CMOS battery for the BIOS general question

I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.

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You can download it direct from this link http://downloadreimage.com/download.php. (This link will automatically start a download of Reimage that you can save to your computer.)

A: Solved: the CMOS battery for the BIOS general question

It will revert to the factory CMOS settings which of course include date and time. You would have to reset all of your BIOS Settings such as boot order, Drive recognition and such each time you booted up. But as far as permanent damage you won't have any just because the Battery was dead, unless the battery also started leaking, not likely with the coin cell batteries.

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Hello Everyone,

I'm building a new computer here, and i'm using a previously owned mobo. I'm having an issue getting pass the BIOS spalsh screen and into the boot menu so i could bootup and install windows.

I have no beeps at all. every component of this computer is brand new except for the motherboard.

I try to go into the setup and i get the dialogue, "Entering Setup..." but it just stays frozen like that.

I know i have to Clear CMOS and i removed the CMOS battery for almost 3 days and nothing at all. i cannot find the CMOS jumper. i see a jumper near the CMOS battery but it isnt labeled clr cmos. i removed it and put it on the 2nd and 3rd pin and the machine doesnt even turn on, but when i locate it back to the 1st and 2nd pin, it turns on perfectly fine, but i still cannot get past the startup screen

the screen i cannot get past looks similar to the image below.

Any help will be highly appreciated!
Thanks in Advance!

A:Solved: BIOS and CLR CMOS question

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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

A:Question about RTC Battery (CMOS Battery) and System Errors

CWILLIAM83 Hello;Allow me to welcome you to the HP forums!The answer is actually -- yes and no. A weak or dead CMOS battery will prevent the BIOS settings from being saved when you power off the PC. If the default settings work OK with your hardware, then the only thing you would notice is that the clock resets. But, if you customized your settings to see the hard drive, then the default settings might not see it. After you replace the battery, you would have to go through configuring the settings-- again.Good Luck

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I am becoming more and more concerned about my laptop's battery each and every passing day. When I check the bottom right of my computer screen to check if my computer battery is completely charged, it says "0% available (plugged in, not charging)". I have had to buy two new batteries because of the same thing and they also read "0% available (plugged in, not charging)". When I unplug my laptop from the power source, it turns off automatically. I cannot even bother calling Dell to check this issue for me because I bought this computer off the street for $35.

My question in general is how do I get this problem fixed and how do I keep an eye on how my laptop computer charges correctly (or not)???

A:General Question about laptop battery charging AND 0% battery

Some reading and testing for you

Why is my Laptop battery not charging? – Drivers.com updates

Laptop Battery Not Charging | PCWorld


The common method is:
- Create a System restore point
- Uninstall (Under the Batteries category in Device Manager) the Microsoft ACPI Compliant Control Method Battery.
- WARNING: Do not remove the Microsoft AC Adapter driver or any other ACPI compliant driver.
- click Scan for hardware changes

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I found an old PC (Progen) in trash that didn't come with hard drive and CD-Rom, but when first try to startup it can go to BIOS. (it has about 32 MB RAM)
Because BIOS has password protected, I try to reset the password by removing CMOS battery and wait for about 24 hours then install back the battery.
The problem now the PC can't go through BIOS, the fan is spinning and green light is on but no beep sound.
Don't know if the battery problem or the mobo already dead
Thanks for any help

A:PC won't go to BIOS, after removing CMOS battery

CMOS only retains BIOS settings for a few seconds after the battery is removed. 24 hours is just insane overkill.

Also, on most semi-modern machines, the password isn't stored in volatile memory and as such will never be "reset" using that method - There will be a jumper on the motherboard to specifically erase the password. You should search for that motherboard on the internet and fine the manual for it.

As for the machine not POST'ing anymore, I would suggest that you moved a jumper or that something is not seated right. Double-check that the ram, cpu, video card, any other peripherals, cables, and battery are all seated properly. If in doubt, remove them and re-seat them. Find the manual for that motherboard online and go through it, checking all the jumpers on the motherboard to make sure they are in the correct positions.

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I've seen a few problems like mine on the boards but never a satisfactory resolution. My problem started with a frozen screen. I did have a few windows open and i was listening to music and surfing at the time. Upon restart case light came on, M/B power light came on, fans on psu, cpu and graphics card all spun up as well as hard drive, but no post beep. Long story short is that I have done everything recommended on various forums, like resetting the Cmos via the jumpers, taking out the CMOS battery, leaving the CMOS battery out overnight, new CMOS battery, changing the PSU etc. and am now at the stage where I have the M/B stripped out of the case on the workbench with just the psu, one stick of memory, Graphics card, Hard drive, mouse and keyboard. Strange thing is computer WILL post with default Bios settings when CMOS battery removed, go through bios setup routine, launch Windows and run perfectly normally. But as soon as I put the battery back, nothing, no post beep, nothing, just spinning fans and no display. Has the Bios Chip got corrupted? The battery clip does look firmly soldered to the M/B and is not bent. I am at a loss. Can't RMA the M/B as its an Ebay job. All the Caps look sound. Is it worth replacing the BIOS chip as they're fairly cheap or is the M/B toast?? Does anyone know anything elseI can try??

System is:

Motherboard: ASUS A8N-E
Bios: Phoenix Tech. Ltd AWARD BIOS ACPI rev.1013
PSU: CIT 750W ATX Power Supply
CPU: Athlon64 3500+
Graphics ... Read more

A:CMOS battery/BIOS problem

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if a cmos battery is dead or very low battery, can it cause problems of a pc not booting up properly as in no signal from monitor, no key board activity an not loading up? ive had this problem a few weeks ago but after taking everything out and plugging it into a different outlet it worked until power went out for around 12 hours today. power did come on for like 5 mins but went back out, pc was in the process of booting up when power went out again. also bear with me the laptop im on many keys wont work due to a curious cat and im using the on screen keyboard to type. thanks for any help you all can give!!!

A:cmos battery question

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Hey everyone...it appears I'm having some issues with a slow clock.  I have an XPS M1330.  Initially, it would fall behind a few hours each day, INCLUDING the BIOS time.  Also I noticed frequent Wi-Fi disconnections, as well as when I would shut down the laptop, it would not completely shut down.  It would go into what I believe would be an "idle" state, showing the blue power LED still being lit.  I would have to then manually shut down the laptop by holding the power button.  That was the only way of getting it out of the so-called "idle" state.  So first thing I decided to try was to replace the CMOS battery which was the first suggestion.  After replacing the CMOS battery, I got about 2 weeks of flawless performance; no slow clock, and no powering off issues.  Now, the clock is running slow again and I can't seem to figure out why.  I updated to the latest BIOS (A14 I believe), which seemed to work for about a day, now it's back to being slow again.  It is not shutting down properly either.  When I check the BIOS time, it is also incorrect.  I'm not sure if this a motherboard issue or what but any suggestions or ideas would be great. 

A:BIOS clock slow- Not due to CMOS battery

I wanted to bump this because I really want to see if anyone has any idea or answers as to what this could be or how to fix it so I can save myself some money and not buy a new motherboard.

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i have a refurbished MSI K7N2 Delta-L mobo, got it from newegg, so i guess that would explain why...
every time i completely unplug my pc from the wall, i get the "cmos checksum error- defaults loaded, press F1 to continue". i thought it was just a bad cmos battery, but after having replaced it 4 times now with new ones, i don't think that's it anymore. i know i am installing the battery correctly, and the jumper cap is in the correct position, i have checked and rechecked the manual to be sure. is this maybe just due to a little bad wiring somewhere on the mobo?

A:CMOS battery will not hold Bios settings

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I have a Compaq Presario 2200 model laptop.

I have an issue where every time by laptop batter discharges the time clock resets. I believe that this is realated to the bios battery. I have taken the laptop appart properly via guide provided on compaq website. This is the maintenance guide with all the spare part numbers listed. However, this laptop is out of warranty.

My problem is that I cannot locate the bios battery anywhere on the board. Could someone with some experience pleae review the diagram for this model and tell me where the battery is?


A:Presario 2200 Compaq - CMOS/BIOS battery?

First of all.

Have you tried to calibrate the battery by BIOS? < This might help a lot of problems.


Have you updated your BIOS ?

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Hi folks!

I have a question. Will BIOS gets corrupted if CMOS battery is left dead for a while? The reason I ask is because I bought a P4 mobo from vendor and it is an non-retailer box. Apparently when I receive the mobo, I tested the CMOS battery is dead and when I put everything together, there is no POST or beep at all coming from the mobo but power light and fan are on. Any idea?

I suspect the BIOS is corrupted because the baterry is left dead for too long. Is my theory correct? Please advice. Thanks.

A:Will BIOS gone if CMOS battery is left till it's dead

"I suspect the BIOS is corrupted because the baterry is left dead for too long. Is my theory correct?"...

I would say yes. This doesn't happen all the time, but in your case, after a new battery was installed, no POST is a bad sign... Did you try resetting the CMOS by moving a motherboard jumper? Is the CPU and memory supported by the motherboards model? Was the CMOS battery totally dead or did it show some DC voltage?

I just repaired a Compaq desktop computer that was built in September 1999. It had an AMD K6 550MHz CPU. The CMOS battery was bad, but it still showed 1.3 volts DC. It should have been 3.0 volts. A new battery brought this old baby back to life

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Is this battery soldered into motherboard or it can be easly changed?
Mods' Edit: this post and its replies moved to its own thread.


Go to Solution.

A:320-151IKB - Question about CMOS battery

sgizmo, the battery pack on your model plugs into the motherboard.   No soldering is necessary.  Page #53 of your model's Hardware Maintenance Manual explains the battery removal process.  Here is a link to that manual for your reference.......
Mod's Edt:  Updated Subject line after thread was moved.

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Is this battery soldered into motherboard or it can be easly changed?
Mods' Edit: this post and its replies moved to its own thread.


Go to Solution.

A:320-151IKB - Question about CMOS battery

sgizmo, the battery pack on your model plugs into the motherboard.   No soldering is necessary.  Page #53 of your model's Hardware Maintenance Manual explains the battery removal process.  Here is a link to that manual for your reference.......
Mod's Edt:  Updated Subject line after thread was moved.

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When you go to the bios and look under battery, you will see moderate, excellent, normal.
Can someone give me the names of what battery status one would see and what is the order? I assume there is more and seems new would be excellent and be listed as #1.

A:General Battery Status in Bios

Excellent (new), Normal (charges to around 90% or more), Moderate (charges to around 80%), Poor (charges, but only to around 50%), and Battery needs to be replaced (will not charge), in that order.  This is only from lots of experience at a very lage company with thousands of Dell laptops, not because I found this documented anywhere (why??).

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Ok, so I bought a HP Mini Notebook for my wife. Model: 1035NR
Everything was working fine. She goes to boot it yesterday and she gets hit with a password right after the AMI bios screen. She asked me if I set the PW, I told her no and she said she didn't either.

No big deal. I take it apart and unplug the CMOS battery for about 20 minutes.
Hold the power button down for a bit to discharge any left over juice. Put it all back together and same thing.

So I tried to leave it out for over 12 hours and the same thing.
I even tried various AMI master passwords (I knew it wouldnt work, but you know how desperate we get). So now I'm stuck.

I googled it today and found various information.
Most leading me to believe I am stuck with a paperweight or will have to send it to HP to have it fixed which will run me almost what I paid for it.

So am I missing something here? Anything else I can do?
Thanks guys!

A:BIOS password. Unplugging CMOS battery doesn't work.

Well I can tell you that removing the battery will NOT clear a pw on a laptop. This is a security feature. Next we do not assist with pw help. This thread is now closed.

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Hi All,
i need to change a CMOS Battery on my Laptop Latitude E6400, you can help me how to buy it?


A:How to Order Part CMOS BIOS Battery Latitude E6400

Hi ekeste,
We can help you order provided parts are available for the system model please share the service tag of the system  .
For me to better assist in troubleshooting, please click my DELL-username and send me a Private Message with the Dell Service Tag number and your email address.

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HELP! Computer won't boot! Tried everything!

Ok so this is my set up:

DDR400 512mb Ram

Asus A7N8X-X motherboard

sapphire radeon 9600xt 265mb GFX

amd athlon 2600+ cpu (1.91ghz)

80gb HD (just some cheap one- i forget brand, perhaps seagate)

edit: a floppy and dvd burning drive

Ok and the problem is:

I installed a ripped off ****ty version of XP. Never really worked splendidly.
I changed somehting in the bios, i had no idea what it was, i'm stupid for doing so i realise. it was something to do with speed, it was at about 100mhz and i changed it to 200mhz. also note, i had the "bios virus alert thing" ON.
the next few boots were dodgy and it only booted up every second or third attempt. if it didnt boot up it wouldnt boot and just went beep (long beeps and repeated -in no code) this worked for 4 boots before it never booted again.
it just beeped.
until i moved the jumpers on the 3 pins from the two pins closest to the battery position to the furthest two. and turned the pc on. it didnt beep. the monitor didnt respond and but it seemed to be turned on (the cpu fan was going and a green LED on the mobo was on). i then turned the power off. and stuck the jumper back on the original pins and turned it back on hoping the BIOS would be reset but the beeping sequence continued and nothing seemed to start. So then i took out the battery for over half an hour... then put it back in. (with the jumper still on the original pins- nb: the... Read more

A:HELP! Computer won't boot! BIOS? Reset it. CMOS Battery? In and Outed it. HELP!

The Athlon XP 2600 that runs at 1917MHz runs on an FSB of 166MHz and has a clock multiplier of 11.5 (166 X 11.5 = 1909Mhz).

So if you have a system bus setting of 200MHz and the clock multiplier is set a 11.5, you were running it at 2300MHz, which is seriously overclocking it.

The processor might not have been up to that much overclocking and died.

Find out what BIOS settings do before you change them!

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I have purchased a replacement battery for my HP G42 laptop that is not an original HP mainly because its a lot less cheaper. So my question is would this battery have any effect on the other hardware components of my laptop? Btw, I noticed that sometimes it randomly shuts down as if you have physically removed the battery without shutting it down..

A:General Battery Question

A generic battery will work in your laptop with no adverse effects provided the specifications are an EXACT match to the original OEM battery's specs.

The important part is: Output voltage.

After that the important thing is to buy batteries from a seller with good reviews and a good rep. There are just some poorly manufacturered batteries out there.

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So I have a machine I have just replaced the mobo on for someone but everytime it is unplugged from the wall upon reboot a message appears during post saying default values have been loaded and you have to press F1 to enter setup (bios) or F2 to continue.
I thought this was no big problem and swiftly replaced the CMOS battery but it is exactly the same, resets everytime power is cut
The board is an MSI B75MA-P45 and is brand new
Thankfully the default sata mode is AHCI so the machine still boots after reset but its really annoying me and the clock resetting stops WU from working and also threw a temp activation problem that was easily dealt with.

HWinfo does not show VBatt reading and speedfan does but reports 4.08V which is clearly wrong from a 3V battery

Any thoughts/ideas would be gratefully received as im running out of options other than an RMA which is going to be a major pain as this is her only computer and cant be without it

A:BIOS resets everytime power is unplugged cmos battery replaced

Just some thoughts.

***Why was the motherboard replaced??***

1. Is their a default jumper pin on the motherboard that is in the wrong position.
2. I have seen a power supply cause this problem.
3. Lately HWmonitor for other members has been giving wrong readings.
4. It has been know that a infection will monkey with the time so one can't get help on line.

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I just got a new HP laptop and noticed that the battery would drain more than 10% when it's not in use for around a day. Now I've been using a macbook for 2 and a half years and the battery would barely drain even after 5 days of non-use. Maybe it will drop to 96% or something. On my HP it will drop to 89% after one day of non-use. Is this normal?

A:general laptop battery question

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Its a packard bell laptop, and the system started to freeze for no reason. No viruses. Now, I can usually only move the mouse pointer-if it lets me start windows at all (xp). As of tonight, the system wouldnt let me even pass the startup screen, it kept asking for a non existent system password to continue! The system bios clock seems to reset itself too, so I believe the whole problem to be related to the cmos battery.

My main question is, how much should I roughly be expected to pay for a cmos battery and installation from a general pc repair store? The laptop is out of warranty, so I dont really want to be spending 30+ just for Packard to find and install one either. The reason I need someone else to do it is because this particular packard system has the most awkward setup, and therefore access to the battery is next to impossible..

as you can see from my (slightly blurry) photo-

there are only 3 panels on the back of the machine that you can remove- 1 hard drive, 2 ram, and 3 wifi card (I think!).. the cmos battery (the circle!) is to the right of one of the panels, under the casing. I have tried removing the entire casing, all screws and connections, and even from the front, trying to get to it by removing the keyboard, but it proved impossible to me, so Id rather get someone else to do it. No doubt the difficulty is on purpose so that you would always send it to packard for repair, and for a high price, bu... Read more

A:wont boot, bios/clock errors-how much to replace a cmos battery to fix this problem?

If there's a dismantling guide for your laptop online you could try to fit a new battery yourself.
If you're ok with that post the exact model of your laptop and I/we will help you look.

Otherwise to get the best deal I would phone a few small local computer shops and compare their prices with big chains like PC World.

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I recently completed two new sytem builds. When I finished, I just loaded the O/S and that was pretty much the end of the story.

My question is about the disc that they give you with the motherboard. The one that has the chipset drivers and bios flash utilities.

I never used them because everything worked fine without loading them. Are these disc's just supplied in the event of future problems or are you suppose to load them after the build is complete.?

A:New build/ bios- general question

This is one of those maybe questions. Yes, in many cases the native drivers, etc., installed with XP for instance will cover all the bases but it's also true that the drivers for say an on board RealTek AC97 audio set have to be loaded from the disk. That one's fairly common. The flash utilities you hope you never need and other drivers are as shown above, possible.

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I am working on my sister in law's Dell Dimension 4700 and I cannot find out what CMOS Battery I need to buy.

Can anyone please help?

A:Solved: CMOS Battery

The cmos battery usually has a number on it.
CR2032 are pretty standard for computers.

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Once I set my clock on my WinXP Home machine and restart it or shut down the time is always wrong once it is booted back up. I believe the reason is because of a dying CMOS battery. Does this sound correct? Also could having a low CMOS battery cause Windows to crash and restart? Thanks for your help!

A:Solved: CMOS Battery

Yep, if the time stops when you power down, that's a classic sign of a failing MB battery. However, that shouldn't cause Windows to crash, that's a different issue.

I'd start by replacing the battery, then checking the connections and seating of all connectors, memory modules, and expansion cards.

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Hi Folks,

I've just bought a "new" computer (IBM A31 Type 2652-PBU). It had no hard drive or OS (but had valid XP COA), so I did a fresh install of XP onto a hard drive that had old data which I didn't care about.

When the laptop arrived, I needed to reset the date and time (It was on Pacific Time-I'm on Eastern Time, Daylight Savings). I had some issues getting online, so went downstairs and hooked up to our Ethernet cable. Before hooking up, I noticed the time had reset to Pacific Time. After downloading and updating Windows XP, Service Packs, virus protection and anti-malware, I reset the clock again (That was a week or so ago).

I told the seller about the issues I was having (which have since been resolved, THANKS to you folks!)
As for the clock needing to be reset twice, he suggested that the CMOS battery might be ready for replacement soon.

My questions are: (1) How big a deal is this? (2) Does the CMOS battery do anything other than the date and time? (3) If it dies, will it take any special skills to replace, and if so, please specify (4) Does this indicate an issue with the motherboard or anything?

Thanks for any guidance you can give, once again!

A:Solved: CMOS battery?

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My mum has been having problems with her 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 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.

A:Solved: CMOS Battery?

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I have a laptop vintage 2004 (HPze4700), and I was 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 5 to 7 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 XL2 - vintage 1997) and the CMOS battery went out on that a few years ago. It still will boot on AC 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'... Read more

A:Solved: CMOS Battery . . .

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Hi all!! Hope i'm post this in the right forum. My daughter just bought my grandson a used computer. It had win 98 on it and we installed winxp. When i turned the puter on this morning i'm getting a message that says cmos battery is low. What can I do about this??? any help would be appreciated. thanx.

A:Solved: Cmos Battery Low!!!!

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I have been advised to replace my CMOS battery. A few questions.

Is the CMOS battery the same thing as the RTC battery?

I understand that some CMOS batteries are soldered in. According to my manual, however, mine does not appear to be soldered in.

What precautions need I take before replacing the battery? Is there possible data loss?

What else should I know?

Thanks a bunch.

A:Solved: CMOS battery

Also, where would you recommend purchasing a CMOS battery?
How much can I expect to pay for a compaq laptop about 6 yrs old?

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How long should a CMOS battery last? Does this battery stay charged when the computer is in use?



A:Solved: CMOS Battery?

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I have a Dell Studio 1737 win vista.I had to take it down to motherboard and I notice where the cmos battery goes,the part that holds it in place, on one side it was not connected to motherboard.I'm am wonder do I need to solder this back to motherboard are is this the way it is supposed to be.I went to manuel but cannot see the part that the cmos battery goes in to see.Thanks for any help anyone can tell me are show me.

A:Solved: Cmos battery

A picture would be handy so we can see what you can see.

Are you experiencing any issues? Why did you have to "take it down to the motherboard"

As a quick answer - I highly doubt you will have to do this.

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Hello! I am having a little bit of trouble with my Dell Inspiron 1526. The other day it did not boot up, instead I got a message -- "Time-of-day-not-set- please run setup program. Strike F1 to continue, F2 to run setup utility program" I ran the setup utility and changed the time to the correct time. I have not had that message since. I have been able to boot to windows Vista every time since.

However I wanted to investigate a little further --- I wanted to run dell's diagnostic utility. The P.S.A. (Pre-Boot System Assessment) started and I walked away from the machine. When I came back it was off. I tried it again - it got into the PSA and some of the test were passing and then it got to a memory test and shutoff. I ran it again and it did pass a few test and it shut off before it even made it to the memory test.

I first thought I need to replace the cmos battery but now I am not so sure. I'm wondering if the PSA and diagnostic tests are running on that battery even though the laptop is plugged into the wall.

Again, I am still able to boot up windows (with no time issues) but I feel like I am ignoring an underlying issue with the machine. I guess I thought if it were the battery it would be completely dead and I would always get the time not set message because it would never remember the time. I also question the memory now and maybe the mother board???

Many thanks to anyone with some thoughts on this matter!!

A:Solved: Is it the CMOS battery or something else??

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How long does the average cmos battery last? Also what are the typical symptoms when the battery goes?

A:[SOLVED] cmos battery

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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 purchased a used HP 6730b laptop without a hard drive. I had a hard drive to put in, which I did. When I installed the hard drive I noticed what appeared to be an empty battery slot (about the size of a nickel). When I powered up the laptop it said it recovered from a BIOS Failure, press enter to continue. It booted up fine, the time was off, but I set the correct time and date it holds the correct information over night. In other words it appears to be working correctly without this battery. I've tried to look in the service manual, but it's not clearly shown exactly if this is CMOS battery - would there be any other "nickel size" battery in the laptop? Is it possible for everything to run correctly with NO battery?

To make it more confusing, I found a "nickel sized" battery I had, put it in, but when it powered up, the date and time were wrong and I was unable to get the wifi adapter enabled (it said it was but it wouldn't connect). I then took the battery out again, left the slot empty, powered up, set the time and date and the wifi is working great again. I'm confused why this battery would have an affect on the wifi adapter.

Do you think I'm ok just leaving the battery slot empty? Thanks!

A:Solved: CMOS Battery confusion

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I have removed CMOS batteries before but this Abit KN8 board seems different. It seems to have two tabs with a clip or spring between them. How do I get the battery out? I don't want to break the socket!



A:Solved: Replacing CMOS battery

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After changing my CMOS battery three times/seven years it has suddenly occurred to me to ask a question!

I believe that if changing this battery is delayed until it is powerless the system's BIOS would need serious attention.

How does the BIOS maintain its settings if all power to the computer is removed for routine CMOS battery replacement?



A:Solved: CMOS battery renewal.

Read all about it here: http://www.pcguide.com/ref/mbsys/bios/compCMOS-c.html

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Hey All.
I removed the cmos batter from my motherboard and after about 15 to 20 minutes put it back in.
now when i start my computer it crashes on the loading screen.
Does anyone now what the problem may be.

A:Solved: Removed CMOS Battery

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I get the odd old computer coming into my workshop with a flat CMOS battery, and rather than putting a new battery in I usually scavenge one out of a dead computer that isn't very old (mostly ones with dead motherboards that weren't economical to repair), since their CMOS batteries tend to be fine. A new battery has a voltage of 3V, what I'm wondering is, if the voltage is reading less than 3V on my multimeter (e.g. 2.93V) does that mean the battery is going flat and won't keep accurate time, or will the timekeeping only be affected if the voltage drops below a certain level, e.g. 2V? Most 2nd-hand batteries out of PCs only a few years old still read 3V.

A:Solved: CMOS battery voltage

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I Have A Rather Old Pc Chips Motherboard With 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 3 Volt Battery Replacement (2x 1.5 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 Have Advised Me That It Is The Two Outer Pins Which Should Be Used....But I Do Not Know The Polarity.....Can Anyone Advise?

The Motherboard Is TX PRO PCI Chipset PC82C371TX NC3005500Es8

I Have Enclosed A Photograph Of My Dilemma.

Any Help On This Matter Would Be Greatly Appreciated.....Thanks.

A:[SOLVED] Cmos Battery Replacement

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Inspiron 8200 laptop, XP.

On startup I am getting an error message directly after POST:
Primary HDD not found. Optical drive not found. No bootable device found.

The OS does not load.
The BIOS does not list any primary drive or optical drive. BUT I can run a drive diagnostic from floppy and it says the IDE drive is working fine. After I run the diagnostic the drive will show up in the BIOS for a short time. But the computer still will not boot. I can sometimes boot with the XP setup disk but it stops before I can get to the repair screen.

Does this sound like a dead CMOS battery? I unplugged it overnight. When I plugged it back in this morning the BIOS saw the drives for a very short time but still had the same boot message. Now it doesn't show them anymore.


BTW: I flashed the BIOS to no avail.

A:Solved: Dead CMOS battery?

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I replaced my CMOS battery and now I can't boot-up. I keep getting the "Boot Failure: System Halted" error. Anyone have a idea as what I need to do to get back to Windows boot-up?

Windows XP Pro
Intel 850GB MOBO

A:[SOLVED] Replace CMOS battery

If the battery is okay (have you checked the voltage - usually 3 volts) then it could be that it is not seated properly in its holder on the motherboard. If that is okay it could be a motherboard problem which caused you to replace the battery in the first place.

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I also have this item on another ? for another issue as well. This time I am having a WEIRD problem with the internal clock...simply put IT WONT KEEP CORRECT TIME. It appears that it will keep correct time UNTIL you shut it down. Upon next system boot the clock picks up from where it left off on last shutdown. Is this a bad CMOS battery?? If it is should I buy one from ebay?? I noticed in the BIOS that when I se the correct time it wont follow in the second clicker as in the seconds counter wont count upwards. A little help would he appreciated

A:Solved: XPS M1330 CMOS battery bad?

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I have old Tecra R10-10W

Aftert long time in the cabinet, it say CMOS battery error and after charging can I not startup on the old system (bios) password.

How to reset the bios password and is also required replacement cmos battery and I can do it myself?


A:Tecra R10-10W - CMOS battery error and next bios password error

you can change cmos battery your self np,for bios pasword use google,i havet a hp mini with same problem and foundet a program that have reset with the help off error code when inserted wrong password 3 times in the row,then i used error code in the program and got password,restarted hp and inserted password now is working bp.Do i have also a old tecra and have difrend problem with it,evrithing sims to be in order but laptop wont start in first tray,after several restarsts shovs startup screen,then runing bp,if restarted again same story,needs several restarts and then is runing again,trayed with outside monitor same thing,any ideas?
here is the link for your problem and sulution: http://dogber1.blogspot.com/2009/05/table-of-reverse-engineered-bios.html

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I bought a cheap laptop off craigslist recently, and when I say cheap, I mean cheap. There were no problems with it that I can tell so far, other than the Date&Time do not save, and after restarting the computer, it resets to Jan 1, 1980. The only thing that I could find related to this issue, is replacing the CMOS battery, I've never had to replace one, so I know nothing about it, especially not on a laptop.
The model of the laptop is: HP Compaq 6715b - I've googled various things related to replacing the CMOS battery, what battery to buy, where the battery is located, and I've found no results, thus why I'm posting here.
To the point of the topic:
Is it the CMOS battery that needs replaced?
Where is the CMOS battery located?
Is it hard to replace a CMOS battery in a laptop?
How do I find out which battery I should buy?
Where should I buy the battery?
Should I just take this laptop to my brother-in law who works for Geek-squad, and save myself from being unable to put the laptop back together?

Help is appreciated, thanks in advance.

A:Solved: Replacing the CMOS battery in a Laptop?

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