laptop error 502 cmos invalid

Don't ask how to hack password. (BIOS Passwords)
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Posts: 1
Joined: Mon Apr 09, 2018 4:34 pm

Good day
I have a laptop that will not boot I have to remove the cmos battery for a min then put it back in and reboot then I get the above message and sometimes can press enter to boot into windows. Once there I have to change my date and Im ok until I shut off my laptop. I have tried to flash the bios with an update but still same problem. I was thinking of trying to replace the bios chip on the MB.
The Hardware Archivist
Posts: 6286
Joined: Wed Mar 20, 2002 7:11 pm
Location: Netherlands

Before that replace the CMOS battery with a verified new one.

Do not assume anything

System error, strike any user to continue...
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