On 08/08/2020 11:43 AM, George N. White III wrote:
Most systems use a "coin" battery to maintain BIOS settings while powered
down. Unexpected changes after power has been off usually indicate
a failed battery; they are generally easy to replace.
I don't know if it's still true, but PrintScreen used to work when you
were in CMOS, or the BIOS setup screen. (Probably not; useful things
like this tend to go away as people forget what they're for.) The point
is, one you get everything set up correctly, you can use this to get a
hard copy record of how your system's supposed to be. If you need to
reset things after a battery change, you can use this for a guide. And,
if there's room, you can keep it inside the case so it won't get lost.