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

P4M900T-M2 Intel Pentium R dual CPU E2160 1.8 Ghz default BIOS Setting


The CMOS Checksum Bad Error during the pre-booting process only indicates that the CMOS battery is exhausted and it can not no longer save the current BIOS settings, Time settings and many more things.

The first and and the only way, according to me, to solve this problem is to replace the CMOS battery.

Please let us know, if this solution have helped you.

Hope this helps, Mrityunjay.

Jun 18, 2012 | EliteGroup ECS P4M900T-M2 Socket 775...

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I used jumper bios reset and now gettin bad checksum error. on the mother board writen that K8N rev 1.01 i downloaded k8n motherboard rom file and renamed as k8n.rom and copied to disket. its deleting and...


Hi.

The most probable reason you are getting the bad checksum error is you have to set the date and time because you have cleared the CMOS and reset the BIOS.
You should also get a message that says press F1 to load defaults or press a certain key to access setup. Access setup (BIOS) and set the date and time. That should take care of the bad checksum error.
Another good idea is make sure the motherboard battery is not dead either.



Regards.

Jun 17, 2011 | ASUS Motherboards

1 Answer

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 Motherboards

1 Answer

CMOS CHECKSUM BAD


CMOS Checksum Error, which refers to corrupted values of the CMOS settings, the ones you set through the BIOS setup program. This error means the contents of the BIOS code itself are damaged.

Diagnosis: The BIOS ROM chip on the motherboard is probably faulty. It could also be another component on the motherboard.

You should make sure that all of the BIOS settings in the system are correct, by rebooting the system, going into BIOS setup and double-checking all the values (hopefully against a recent

you should select the option for optimised defaults select that one
You will also need to reset the time and date.
Save, Exit and re-boot and everything should then work.

to enter bios you will see on the bottom of your screen during the boot up process to press a certain key press and hold that key enter bios scroll to advanced bios features

hope this helps

Jan 29, 2011 | ASUS M2N-MX Motherboard

1 Answer

Always start up with cmos checksum error, cpu ratio has been change


A BIOS checksum error is most likely caused by a flat BIOS battery.
Replace the battery with a new one (it is usually a coin size battery - type CR2032) and then boot up and go to the BIOS configuration and set the Date & Time setting etc.

Jun 30, 2010 | MSI K8MM-V Motherboard

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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.

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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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Error message


Open Your system and there is a Battery which looks like a Coin. that is CMOS Battery (CR2032) Change that battery and then Reboot your system and try go to BIOS menu with DEL , F11 , F1 or F2. Either of these Buttons can Work.

This will resolve your issue

Nov 26, 2008 | Motherboards

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.

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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
CHECKING FOR FLOPPY DISK
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??????

Nov 15, 2007 | ASUS M2N-MX Motherboard

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