firstly, I'm really sorry if this is the wrong forum - couldn't decide if a windows or hardware PROB!

I have a PC which I built 2yrs ago, after teaching myself how to do it after getting a marketing job at a computer components firm. However, I've done nothing with it since so have forgot most of what I learnt...

A week ago the pc just wouldn't turn on, at all. Took to a repair shop - it was the power supply as I thought & they replaced it. They tested it with a setup there & it worked fine, so they connected back up the rest of the components inside the case
& I collected it. However, just got it home & set it all back up, but when turned on it only gets as far as the memory cheeck screen - seemingly finding the memory, HD, DVD drive etc ok - then says 'CMOS checksum error - defaults loaded. press F1 for setup or delete to continue', but pressing either does nothing. tried a few times now.

From looking through your forums it seems it MAY be BATTERY related? Are there any other things I should try first? Feel a bit out of my depth!

Can post the specs if that will help...

Thanks for any help in advance - and apologies if text speak crept in anywhere - having to access via my cellphone...It's probably the CMOS battery...part # CR 2032. They TEND to die when a MACHINE is left to sit for any long time.
Remove all power when working inside the case and take anti-static precautions...

If the F1 & Delete keys are doing nothing then I suspect you have a USB keyboard, if this is the case then try a PS/2 keyboard.Nice catch, Fed...A curse on USB keyboards & mice. Off with their heads ! !