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CMOS checksum error

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6 replies

by helloparminder

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sumtimes at startup I recieve this error 'CMOS checksum error' and I have to press F1 to continue. what is the reason for this. any solution?

6 replies

by jepott

You are getting a bad checksum from your CMOS. Check the battery on the motherboard... it's probably dead and needs to be replaced.

by thechas

If you updated (flashed) your BIOS and did not clear the CMOS afterward, you can get this error.

As mentioned, weak CMOS battery can cause this.

So can a CPU or case fan that sends noise spikes on the RPM signal line.

In a similar question, it was posted that bad system RAM can also cause a CMOS checksum error.

Chas

by 3xp3rt

When you turn off your computer you switch off the current? This error can happened when the battery of CMOS can?t keep alive the settings. If this problem appear just sometimes it?s possible what I asked bellow.

by nazil dsouza

it is normally the cmos check the voltage of the battery with your multimeter and be sure to replace it with the same specifacation battery example say cr3220....

by 75501.2545

I did all the normal countermeasures without results, finally I disconnected the power supply plug, reinserted it, and it cured the problem. Possibly corrosion.

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