CMOS Reset (502) The CMOS checksum is invalid

[Sandeep1121]

Hi Sir,

I am getting a issue related to Bios and its giving me error CMOS Reset (502) The CMOS checksum is invalid

I have already checked this error on Google and as per suggestion i have already update the Bios but same problem is coming again and again.

Kindly help me to resolve this issue.

Thanks,

sandeep

[Nal_NR]

Hi @Sandeep1121,

Welcome to the HP Support Community. 

I understand that you are getting CMOS Reset (502) error. I'd like to help!

Please follow these steps once and if it fails keep me posted. 

CMOS Reset (502) The CMOS checksum is invalid

During the startup process, the system performs a checksum test of the BIOS. If the checksum is incorrect, the BIOS is assumed to be corrupt and the system installs a hidden copy of the BIOS to correct the problem, and the startup process continues. The following message displays for 15 seconds before the computer automatically reboots. You have the option of pressing enter to proceed without waiting 15 seconds.

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:

For desktop computers, go to HP Desktop PCs - Recovering the BIOS (Basic Input Output System).

For notebook computers, go to HP Notebook PCs - Recovering the BIOS (Basic Input Output System).

If restoring the BIOS fails, contact HP.

Hope this helps! 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

[Nal_NR]

Hi @Sandeep1121,

As we did not hear from you, I'll be closing this case for now. If you need further assistance, feel free to reach out to us. 

Have a great day!