Over 1 million tech questions and answers.

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

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

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

RELEVANCY SCORE 200
Preferred Solution: PC won't go to BIOS, after removing CMOS battery

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.

I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.

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: 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.

Read other 4 answers
RELEVANCY SCORE 77.2

Hello everyone,
I have been having a problem with my laptop recently. A few weeks ago my laptop turned off, and wouldn't turn back on. I did some googling, and found suggestions to remove the memory, SSD, and CMOS battery, wait, then put them  back in and try again. When I did that, it didn't work the first few power button presses, but then it turned on. It has been consistent like that. I have the battery out, and on AC only, when I remove AC and CMOS battery, then plug the AC back in, the laptop will boot after hitting the power button a few times.

Any suggestions?

Read other answers
RELEVANCY SCORE 72

I am working on a relatives computer and am having major difficulties. When I received the computer it would not boot. It would hang up when running the bios and stop with the error message no mouse, no keyboard or keyboard error. I was able to get the mouse recognised but not the keyboard. The cmois battery was removed and replaced and now there is no video. I am not sure what this computer is running. Theres a digital readout on the front that says 200 when you start up. It has a diamond video card. When I power it on the cpu fan works power supply works, theres no lights on the floppy or on the cdrom that light up. Any suggestion on what to do to get video back and resolve the original keyboard error message. I did try to boot from a floppy before the batteries removal and that did not work.
 

A:Monitor not working after removing cmos battery

Read other 10 answers
RELEVANCY SCORE 71.2

Hi all,
So I've bought an OptiPlex 7010 SFF and wanted to install Win10 on it, so I've changed the BIOS settings to make a UEFI boot, Secure Boot etc. and I was stuck on a black screen.
Browsed the internet for a solution - update BIOS.
Okay then, downloaded the utility, temporarily installed Windows 7 on it, BIOS updated successfully from A12 to A25.
Changed the settings back to make the UEFI installation happen...
Powers up normally, HDD starts, and black screen. Actually - I can press the escape or spacebar to cause the progress bar to appear altogether with "F12 - Boot Options" but nothing else. After that, a complete darkness appears.
Tried to enter BIOS - No luck. Smashing F2 and F12 causes only to show "Preparing to enter BIOS setup" or single-use (?) boot menu. After that again - black screen.
Removed the CMOS battery, messed with PSWD (Password Jumper), removed everything and installed back, nothing.
Tried to start it without RAM - beeps so it's supposed to be alive.
Hope that's not a mobo issue...

Read other answers
RELEVANCY SCORE 69.6

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

Read other 7 answers
RELEVANCY SCORE 68.8

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

Read other 13 answers
RELEVANCY SCORE 68.8

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.

Read other 22 answers
RELEVANCY SCORE 68

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
 

Read other 8 answers
RELEVANCY SCORE 68

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.
 

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.
 

Read other 2 answers
RELEVANCY SCORE 68

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?


Thanks,
Darmin
 

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.

Second

Have you updated your BIOS ?
 

Read other 2 answers
RELEVANCY SCORE 67.2

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!
 

Read other 2 answers
RELEVANCY SCORE 67.2

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

BR
Renato

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.

Read other 3 answers
RELEVANCY SCORE 67.2

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.
 

Read other 1 answers
RELEVANCY SCORE 66.8

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.

Read other 9 answers
RELEVANCY SCORE 66

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-
http://img600.imageshack.us/img600/2219/cmoslocation.png

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.
 

Read other 1 answers
RELEVANCY SCORE 61.6

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.
 
Xen

Read other 1 answers
RELEVANCY SCORE 61.2

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?

Thank...

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

Read other 1 answers
RELEVANCY SCORE 57.2

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

Read other 1 answers
RELEVANCY SCORE 57.2

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?

Read other 5 answers
RELEVANCY SCORE 53.6

Hello,
A week or two ago, I started seeing a pop-up appear on my Inspiron screen (I run Windows 8). The pop-up said that the AC adapter was not recognized, and therefore, the battery would not charge. It was the same 65W adapter that came with the laptop. I hit F2 at startup to check the BIOS, and it said the adapter wasn't recognized. I decided to order a new adapter. While I waited for it to arrive, the battery gradually drained down, but the laptop continued to work while plugged in.
The new adapter came today, an official Dell adapter. I plugged it in... Same error message. Adapter not recognized.
I ran a check on the battery; the system says the battery is fine. I pulled the battery, and the laptop still worked via the adapter. I jiggled and checked all the connections. Couldn't find an issue and couldn't make it work.
I checked the BIOS version and date, and it's from 2013. Time for an update! I downloaded the latest version, but here's the problem: It won't install without the battery sitting at at least a 10% charge. The battery, of course, won't charge with either adapter (it's reading at 1% now). So I can't update the BIOS without some battery life, but I can't make it recognize the adapter and charge the battery without the updated BIOS (assuming that's even the problem, but I'm hopeful that's all it is).
If anyone has any suggestions for how I might make this work, I would very much appreciate it! Thank you!!!

A:Catch-22: No BIOS updated without battery, no battery life without BIOS update...

Please list Dell model number and version of windows. Ex: Dell Inspiron 3543, windows 10
If you don't know, type msinfo32 onto the search box, and then look for System model.....
In the meantime, please check the USB port, where the AC adapter is plugged into system, is loose. You could also wiggle the Adapter's end while checking it in the BIOS to see if the Adapter's type appears.  

Read other 4 answers
RELEVANCY SCORE 52

sir,
I know in win 98 we can use debug to remove cmos password but in 2k i tried debug but i didn't worked even in safe mode & safe mode with command prompt please help me . This is to know things in win 2k & i don't want any 3rd party tool to do that
 

A:removing the cmos passwd in nt,2k or XP

Bios password problem

This actually has nothing at all to do with your OS...
 

Read other 7 answers
RELEVANCY SCORE 52

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.
 

Read other 1 answers
RELEVANCY SCORE 52
RELEVANCY SCORE 52

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...
 

Read other 2 answers
RELEVANCY SCORE 52

Tech Support Guy System Info Utility version 1.0.0.4
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i3-2330M CPU @ 2.20GHz, Intel64 Family 6 Model 42 Stepping 7
Processor Count: 4
RAM: 4043 Mb
Graphics Card: Intel(R) HD Graphics 3000, 1797 Mb
Hard Drives: C: 449 GB (352 GB Free);
Motherboard: Intel Corp., Base Board Product Name
Antivirus: None

Just a quick question...

Just yesterday my battery finally decided to give out after 6 years.It will no longer charge.I had decided to unplug the charger and when i did the computer shut down immediately.I plugged the charger back in,turned on the computer and upon initiation i immediately got "cmos battery failure" error.I can only assume this is from the battery pack that just died? Does the battery pack keep the cmos battery charged? Should i change the cmos battery too? I just ordered the battery pack.If i do need another cmos battery,is there a particular one that i should get or can i just get anything as long as it fits? I have only changed a cmos battery in a desktop once back in the 90's.I cant remember what i got.I have never put one in a laptop.Good thing is,it's easy access in my laptop.I just want to be sure tht i actually need one after i replace the battery pack and what exactly i should get..thankyou
 

Read other answers
RELEVANCY SCORE 52

Is it possible to leave a CMOS battery out of a computer for 24 hours without hurting anything?
 

A:CMOS battery

Read other 6 answers
RELEVANCY SCORE 52

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.
 

Read other 1 answers
RELEVANCY SCORE 52

Hi guys,

My computer just started having this problem since Christmas. I've had this mobo since 2007, and this is the first time when I switch on the comp it gives me thsese messages randomly:

"CMOS battery low"
"Error loading drive A"
"Error boot sequence"
"Press F2 to continue or F1 to enter setup"

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 "normal" 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 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 OEM (Lenovo 3000 J205-9686) ASUS M2A-VM with a 690G chipset & AM2 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 Canadian due to shipping costs, but I don't mind US).

Also, my OS is win 7 RC (although that might not be relevant)... Read more

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
 

Read other 2 answers
RELEVANCY SCORE 52

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.
 

Read other 2 answers
RELEVANCY SCORE 52

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.

Read other 1 answers
RELEVANCY SCORE 52

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.
 

Read other 4 answers
RELEVANCY SCORE 52

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 motherboard....you can still get those.
 

Read other 3 answers
RELEVANCY SCORE 52

Can the cmos battery on the motherboard effect the preformance of the wifi adapter?

A:CMOS battery

@kingpin300800 I would so no. I have never heard or seen a BIOS battery effect WiFi performance. REO

Read other 2 answers
RELEVANCY SCORE 52

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.
Help!!
 

A:CMOS battery

Read other 9 answers
RELEVANCY SCORE 52

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.

Read other 3 answers
RELEVANCY SCORE 52

what is this error when i boot my cusin portable it doest boot immediately error appears as" bad cmos battery -error date & time. it says there that i need to choose either f2 (utilities bios or press f1 .when press f2 it goes straight to bios of course! but the best option is to press f1 so it will bot normaly to the xp windows OS specs is WIN XP SP1. Do we need to replace the cmos battery now.
 

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.
 

Read other 5 answers
RELEVANCY SCORE 52

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?
 

A:CMOS Battery

Read other 6 answers
RELEVANCY SCORE 52

Question : Does anyone know if a "faulty" CMOS battery (the CR2032 type) can stop a laptop working?

This is the sequence of events: -

1. Booted laptop from standby as normal.
2. Logged in
3. Everything working as usual for about 30 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 the battery finally gives up.

I used my last CR2032 a few days ago, so before I go trundling down to the shops I would be grateful if anyone could tell me if a "deceased" CR2032 can make a laptop suddenly die.

I haven't seen that before.

TiA

T.
 

A:CMOS Battery.... perhaps ?

Read other 7 answers
RELEVANCY SCORE 52

What kind of battery do I need for B690, generic button or something special?

Read other answers
RELEVANCY SCORE 52

I HAVE A ACER ASPIRE LAPTOP 7551-3068,  FIRST IT WOULDNT POWER UP SO i CHANGED THE EXTERNAL BATTERY AND THE POWER SUPPLY CORD. NOW IT POWERS UP BUT IT BLINKS AT THE BEGINNING OF THE WINDOWS STATUP AND IT TAKES A LONG TIME TO BOOT UP. ON SEVERAL SITES IT SAYS TO CHANGE THE CMOS BATTERY, WHERE IS THIS LOCATED?

Read other answers
RELEVANCY SCORE 52

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.
 

Read other 2 answers
RELEVANCY SCORE 52

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.
 

Read other 6 answers
RELEVANCY SCORE 52

wheres the lenovo ideapad y530 cmos battery located? anyone pls help. TY. i plan to reset my corrupt bios.
 

A:Cmos battery?

Anyone here who knows the location of cmos batt of lenovo ideapad y530.
 

Read other 1 answers
RELEVANCY SCORE 52

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.
 

Read other 1 answers
RELEVANCY SCORE 52

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
 

Read other 1 answers