Question about MSI P4M900M-L Motherboard

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CMOS Checksum Bad message

Upon booting my system after an MSI bios flash upgrade (3.0 to 3.1) I now get the message that my CMOS checksum is bad. I can hit F1 to continue or F2 to restore my defaults. I have removed my CMOS battery for several minutes and replaced it. That didn't work. I also moved my JBAT jumpers from 1&2 to 2&3 and returned to 1&2 - that didn't work. What else - short of taking my system to a repair shop - can I try to get rid of this error?

Thank you.

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  • Anonymous Mar 17, 2014

    Suddenly my PC doesnt turn on, i think its cmos battery as it has been 7 years working hard:) the problem is that i cant identify the battery. Can u help me with this pls?

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If you have another computer download the previous BIOS update of version 3.0 and see if that works.

Posted on Jul 15, 2008

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1 Answer

I have recently updated the system bios it's successfully upgraded but the problem is its giving CMOS Checksum bad error please I yesterday buy the system


Hi.

Exist some problems that can cause that:

1- The CMOS battery. Solution: Change it for a new one.
2- Some problem with the time specifications in the BIOS.
3- Some drive that isn't connected properly.

Mar 01, 2013 | Radio Communications

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ALIVEXFIRE-ESATA2 boots as far as win progress bar and blue screens. first time this happened i got an error message something like.. corrupt/bad checksum and bad cmos. ive had the pc about 3-5 years....


Bad checksum and bad cmos message signal that the chip in which the BIOS is stored has failed. This chip cannot be repaired or replaced, and since it's soldered on the motherboard it means that it is also dead.
Time for a new motherboard.

May 08, 2011 | ASUS Computers & Internet

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BAD BIOS CHECKSUM, STARTING BIOS RECOVERY...


I have seen this be a CMOS battery many times. Also, you can try flashing the BIOS if you continue to have troubles after replacing the battery. You should be able to find that information on the motherboard manufacturer's website.

May 05, 2011 | Computers & Internet

1 Answer

Booting problem


There are usually three main reasons that a CMOS Checksum Bad Error has occurred. They include:
  • CMOS Battery may not be functioning properly. The battery life may have expired.
  • Your BIOS may have been updated (either by user or possibly a virus)
  • The computer may not have been shut down properly e.g. shutting off the computer's main power without first shutting down the computer (MS Windows requires you to shut down your computer before shutting off the power).
Solutions to CMOS Checksum Bad Error The CMOS Checksum Bad Error can be fixed easily by following the listed steps carefully.
CMOS Battery may not be functioning properly
If you suspect that your CMOS battery is not functioning properly, you can easily change it. Before changing your battery, reboot your computer to make sure that the error still exists. If it does, go into your CMOS and write down all of the settings. If all the settings are lost, you can usually retrieve them from your computer manufacturer. Now locate the battery and remove it, you might need to consult your computer’s manual or technical support to remove your battery (the battery a flat, shiny silver colored and coin-shaped). Take down the CMOS battery’s information such as volt, size, etc. Once you have your new battery, you can replace it and reenter your CMOS settings. If your battery was the cause of the CMOS Checksum Bad Error, you should have solved the problem.

Your BIOS may have been updated
If your BIOS have been updated recently, your CMOS settings may have reset. Make sure that the values entered in the BIOS are correct or simply reset them to the default settings. If you believe that a virus has updated your BIOS settings, run a virus scan and make sure that the BIOS settings are back to the default.
The Computer may not have been shut down properly
Sometimes when running MS Windows, if you shut down your computer without first properly shutting down your operating system, it will corrupt the CMOS settings causing the CMOS Checksum Bad Error. You can easily avoid this error by making sure that you completely shut down your computer properly before turning off the main power. Usually this entails going into the Start Menu, clicking on Turn Off Computer/ Shut Down. If improper shutdown was the cause of the error, you may have solved the issue

Mar 05, 2010 | Microsoft Windows XP Professional With...

2 Answers

Cmos checksum error defaults loaded


Make sure the battery your using is brand new. If it is then go ahead and get into the Bios and make sure the date and time is set properly. Once you do that then go ahead and save the changes and exit.

After this go ahead and see if the CMOS exit checksum defaults comes up if not then go ahead and turn off the computer and unplug it. Then after about 5 minutues plug the computer back up and turn it on and if the message doesn't come up then its resolved.

If the cmos checksum error comes back up then try a brand new battery, should be a 2032 battery and then go thru the same steps in setting the date and time and save changes and exit and if the message doesn't come back then unplug the system again and leave it unplugged for 5 minutes. Now plug it back up and if the message stays away the problem is resolved. it the message comes back then that means the motherboard isn't reconizing the batteries and the motherboard would need to be replaced.

Jun 29, 2009 | MSI KM4M-V Motherboard

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Intel 102ggc:The Firmware has detected that Cmos Checksum Error


Hi there.
Basically you first bios update was bad, if you can get into the operating system re-flash the bios again, that will sort it out.

Good luck and thanks for choosing FixYa!!

Jun 02, 2009 | Microsoft Windows XP Professional Upgrade...

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CMOS CHECKSUM BAD USB DEVICE OVER CURRENT STATUS DETECTED SYSTEM WILL SHUT DOWN IN 15 SECS there is no shortcircuit in usb header 5v is ok i also upgrade bios but it did not solve this error


easy......cmos checksum bad =

dead battery ...buy a new cmos battery for £2 ..make sure you install correct way up...

from any pc shop or ebay...

you will have to reset date /time in bios afterwards...f2 or delete usually to enter bios settings..
regards tonster

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Bios


Replace the CMOS battery that is busted. after replacing configure in bios setup and load bios setup default.

Feb 01, 2008 | E-Machines eMachines Desktop PC

1 Answer

Cmos checksum error after flashing the bios


I had a similar experience after upgrading my RAM. When you reset your CMOS and have default settings maybe you should check if your RAM timings are correct. I could not get mine to load with both sticks in until I fixed the timings from the default settings.

Jan 20, 2008 | MSI K9VGM-V Motherboard

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Bad BIOS checksum.... CMOS bad checksum errors


BOOT BLOCK COMPATIBLE VERSION VER .005
BAD BIOS CHECKSUM

CHECKING FOR CD ROM
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO CD-ROM FOUND
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READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO FLOPPY DISK FOUND

Does someone already fix this problem??????

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