CMOS Reset 502 error

Geminiash · ‎07-02-2022

My 7yr old accidentally disconnected the power to the PC. Since then I am getting a Blue screen upon booting with the following Error: "CMOS Checksum 502". It starts normally after a few secs. Upon Starting the Date and Time is not correct and I have to set it manually. Please guide how to solve it.

Prométhée · ‎07-03-2022

hi

https://support.hp.com/us-en/document/ish_4209641-3226345-16

I advise you to go see a professional
As shown here

To resolve the CMOS Reset Error (502), restore the BIOS.

Press enter to restart the PC.
If the error displays after restarting, try to restore the BIOS using a USB drive. For more information, see the "Recover the BIOS using a USB recovery drive" section of the following:

If restoring the BIOS fails, contact HP.

the computer can be completely unusable if it fails

Maybe juste reset :

https://support.hp.com/us-en/document/ish_3966820-3438449-16

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Attention
A bios update is not without risk!
Be aware that if you are offered to do so, it will be at your own risk, the computer may become unusable, think about it

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CMOS Reset 502 error