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‎02-23-2025 03:26 AM

HP Recommended

CMOS checksum is invalid... CMOS Reset (502)

 

I get this problem before starting my computer.

 

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1 REPLY 1

‎02-23-2025 07:41 AM

HP Recommended

The CMOS is the base level of the computer where the BIOS is stored along with various settings used to start the OS loading.  On a desktop computer that error usually happens when the CMOS battery needs replaced.  FYI: it is a coin shaped battery that looks like a USA nickel.  Smooth surface facing up.

So - what is the model number of the PC?  Has something happen just prior to this error showing up?  Please explain.


I'm not an HP employee.
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