Bill;
 Most checksum errors I have seen were memory related, possibly your MB
needs parity memory and you have non parity?
 Do you get any beep codes prior to error message? What make BIOS chip?
Just a thought- Hal Seabolt

Bill M. Smith wrote:

> Hi All,
> I'am putting together a computer from old spare parts for my son.When I
> booted it up I got a "CMOS CHECKSUM ERROR", Press F-2 To Enter Setup.When I
> press F-2, nothing happens. It won't let me into setup. How can I fix the
> checksum error if it won't let me into setup? I tried to clear the CMOS
> Settings with the Clear CMOS Jumper but when I turned it back on I got the
> same message.
> Any help will be greatly appreciated.