CMOS Reset (502) Error Restatrt at each start-up on HP Pavilion 595-p0084

[Viragoxv]

I upgraded my HP Pavilion 595-p0084 to Windows 11 over a year ago, and have had no problems until a few days ago.

I have my PC plugged into a power surge strip which I turn on then press the power button on the HP. Again, no problems for easily over a year, but now, when I power up the surge power strip, the HP power light blinks once, then there's a few seconds pause, and the computer starts up without me having to press the power button. HOWEVER, before the computer is done starting, I get a temporary (3-5 seconds) blue screen (see photo) saying I have an invalid CMOS checksum, and to check the BIOS setup; CMOS Reset (502).

I thought the fix would be to reinstall the BIOS, but I can't seem to find a source.....yet before I go messing things up, I request the help of you experts in such matters.

My thanks in advance!!!

[BeemerBiker · Accepted solution]

Seems a new battery is required.

https://www.youtube.com/watch?v=8vXkQQGh_DY

Unplug from wall

press power button 3-4 times to discharge residual power

touch finger to metal case

do not force battery out as the plastic clips are easy to brreak.l

[Viragoxv]

Thank you Beemer!!! That did the trick!!! New battery fixed it!!!