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I started my pc with no software and os loaded and I got the message: WARNING: CMOS checksum Error My motherboard is: DH61BE and the bios ver. is BEH6110H.86A.0020.2011.0218

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This is an error that occures when the BIOS has lost the CMOS settings. This usually happens if the CMOS battery has drained completely.
The solution is to first try to reload CMOS settings. you can do this by pressing DEL at startup and getting into BIOS. then find the "reset to defaults" setting and reset the CMOS settings. This should solve the problems.
If that doesnt help, then you would have to change the CMOS batter on your motherboard. This is a quite simple task. It is a standard battery and is quite cheap.
Also some motherboards have a CMOS battery connector jumper, refer to your motherboard manual and check if you have this and reset it.
These are all simple tasks, but get someone to help you if you don't feel comfortable doing it yourself.


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Posted on May 22, 2011

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The motherboard battery sounds like it needs to be changed. Not holding your cmos settings, which is why you get the warning and have to reset the time. Please refer to a motherboard manual how to reach CMOS battery.

Good luck, KoBaC

Posted on May 22, 2011

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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.



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Hi there,

When starting your PC, the following error message is displayed:

CMOS wrong
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CMOS Checksum Bad
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Warning! CPU has been changed please re-enter cpu settings in the cmos setup and remember to save before quit!
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Press F1 to resume
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This is due to the fact that the CMOS, which contain data related to the BIOS, has been reinitialized and that your PC has been reset to factory settings.

Solutions:

Reinitializing the BIOS
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    • If the problem persist this may be due to the fact that the battery powering the CMOS (when the computer is shut down allows the CMOS to store information), is depleted.
    • The CMOS battery is a small pin found on the mother board, you can refer to the manual provided with your motherboard to change it or have the nearby computer technician change it for you if you don't want to risk any damage.
    • More information with: Replacing the battery of your motherboard (CMOS battery)
Post back if it is not working we will be happy to help you.
Hope this helps.
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Recommendation: Follow the instructions in this section to address the CMOS corruption. 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 BIOS settings backup).

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If you are using an old computer, there’s a possibility that you already encountered this error message during bootup; “CMOS checksum error – Defaults loaded”. At this point, the PC will halt its operation and requires you to press F1 to continue or DEL to enter setup (mostly but also depends on motherboard) to proceed.

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For most cases, this is caused by the motherboard battery. Buy a new one to any electronic retailers in your area and replace it. Turn on your computer and press the stated key to enter the BIOS setup. It can be DEL for some or F2 but this depends on your computer. On the BIOS menu, try to change the DATE and TIME settings because their values are reset to different value. Most settings are set to default so leave it as it is. Save the settings and reboot your computer.

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