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Computer Will Not Boot

N

NJLOAD

Senior member
A Friends computer will not boot but has power to all the drives, could this be the CMOS battery has gone dead and lost the boot information?

The CPU fan runs, the power supply is sending power to the drives (checked with volt meter) the hard drive has power but not spinning, even tried a drive I know is good and the same thing. No information on the screen, just black.........

Any help appreciated

NJLOAD
 
This mean computer is failing P.O.S.T. (Power On Self Test)

Hard drive wont have anything to do with it at that point. Computer can POST without a hard drive installed.

Basically you have no video, so that would be the first thing to check.
Reseat video card or swap it out, while at it reset memory too.

Do you hear any beeps when powering the computer on?

Also disconnect everything but monitor & power. Its possible for keyboard, printer etc to cause short and keep computer from POSTing.
 
No beeps..............will try video card when I get home from work............
Bottom line here is the fans are working but nothing else................

thanks
 
Is this new build or previously working system?

If the latter, has anything been changed which could cause the problem?

What kind of vid card is in there now, was it just added, or has it been in the system and previously working?
 
Ok.........This maching has the vid card on board....................I plugged in a PCI card I had lying around and still no boot. Nothing but fans running. How about the battery on the Mother Board? If it is weak is it possible to cause this same problem?

Thanks for the reply.

NJLOAD
 
No a weak battery wouldn't cause problem. However the battery does hold settings, and it could be incorrect setting in BIOS that could cause it (not likely). So remove battery & power then try it again without battery.

A computer can boot without battery, the battery is just used to hold any changes made in BIOS.
 
I unplugged everything except the video and still no POST. Any other ideas before I tell my friend to buy a new machine?

Thanks
NJLOAD
 
Only thing else is to swap out cpu, memory & power supply. One at a time.
If still same issue then that means motherboard is probably the culprit.

What kind of motherboard is it?
 
Originally posted by: A.K.A.
No a weak battery wouldn't cause problem. However the battery does hold settings, and it could be incorrect setting in BIOS that could cause it (not likely). So remove battery & power then try it again without battery.

A computer can boot without battery, the battery is just used to hold any changes made in BIOS.
Click to expand...

That's not entirely true. That used to be true back in the old days, but with todays modern mobos, some of them indeed won't boot without a good CMOS battery. I've seen it firsthand. I think it has something to do with the soft on/off feature being controlled by the same device that stores the CMOS.
 
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