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Computer question.

A

Anonymous-0

Well-known Member
"Cmos checksum bad" is the first thing I see when I boot the computer.
What does that mean?.
Could it be telling me to update from XP.??
Thanks.
 
Generally means the battery that backs up the non-volatile memory is bad. This is usually a replaceable battery on the board, although in some cases it may be soldered in place, in which case you'd better leave it alone if you don't have the skills and tools to work on circuit boards.

If you don't replace the battery, you'll just have to run the BIOS setup each time you start up your PC. Each brand of motherboard has a slightly different way to get into setup, so you'll need to download the manual for your motherboard if you don't already have it.
 
I agree, sounds like a dead battery.
Desktop or laptop?
On that screen where it gives the error, most will give you an option to enter setup or continue.
If you continue you will probably notice your date and time is wrong in XP, but it should work ok for most everything.
If you enter setup and set the date and time all will work fine as well, but it will probably do it again after being turned off for a while.
 
The battery is bad in an old beater computer I have in my shop, and when I boot it up it will go only so far and then says to strike the F1 key to continue, which it does. I assume at that point line voltage overrides the battery.

Could be your problem.
 
It's telling that your computer to old to update to windows 7 right now new computers are real cheap get one that is loaded up real good so can keep as long as possible
 
Bad CMOS battery. It is a CR2032 in most computers and easy to replace. Turn the computer off but leave it plugged in to change. Check your time & date to make sure it is correct.
 
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