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Troubleshoot CMOS Checksum Error


You power up your computer and the screen displays the following error message:

CMOS checksum Error: Defaults loaded

Possible Causes

A checksum error shows that boot up settings which were previously set have been changed. This usually happens when the battery looses its charge and thus fail to retain the CMOS settings. This can also be caused by a power surge and a damaged motherboard.


Reboot the computer

If the error persist, replace the CMOS battery

Enter the values back into CMOS or reset values to default