CMOS Checksum Bad

Fanax

Reputable
Apr 5, 2016
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Hello,

I updated BIOS for Acer MCP73T-AD and something went bad (I think). Everytime I try to turn on PC, I get "CMOS Checksum Bad" error. Only F1 button works and I can get to BIOS settings. But, again restarting PC... "CMOS Checksum Bad". I tried changing new battery, disconnected all hardware (HDD, USB etc), left only one stick of ram. Changed CMOS jumper. Even tried changing CPU, but no luck. Can't get past "CMOS Checksum Bad" error. I'm really out of options. Is there a way to downgrade BIOS version? Any advice and suggestions will be greatly appreciated :)

 

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