I'm upgrading a PC for my parents with some bits I had lying around (the pc was also originally built from some bits I had lying around ), a 4400X2, a 6600GT and a Gigabyte K8N-F9 mobo.
I had Vista installed on it and apart from a crash during installation it seemed to work ok. Tonight I was going to install XP instead of Vista for them so I turned it on, went into BIOS, changed the boot order to CD first and hit 'Save changes and exit'. The screen went blank, then went into sleep mode and never came back on. With the original (generic) PSU the fans spin up but nothing else happens.
So far i've tried:
Reseating CPU / Heatsink
Unplugging everything but RAM, CPU and video
A different CPU
A different power supply (fans didn't spin up with my Antec PSU)
Running out of the case on a non-static surface
Different CMOS battery
I think either the board has finally croaked or the BIOS has somehow been corrupted when I tried to save changes. Any ideas on what else it could be or what I could do?
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I had the exact same problem about a month back where my system would not post. The fans would spin and the HDD light would light up but I wasnt getting the post 'beep' nor was there any display. After RMAing the board , when I tried to fire it up having got it back... same problem. As it turned out it was my display card. I swapped the card and the board posted and evrything went about in normal routine. Tried the old card on another system.... same thing, the board wouldnt post.
I never imagined my card would be the culprit.... oh well thats how it was. SUggest u try it.
Oh and I even started a thread here about the problem.
Quick update after the post-mortem (if anyone except me is interested ).
The cause of the motherboard failure may have been the old classic, user stupidity. Looking at the board I realised it doesn't have a fan connector for a northbridge fan. Previously i'd been running a fan on the northbridge from the case fan connector but with it being 6 months since i've looked at the board I think I forgot that point. Long (and boring) story short, I ran the board with the clear CMOS jumper, which I had mistaken for the northbridge fan connector, shorted by a small fan on the northbridge.
I don't know if that is what caused the failure but i'm pretty sure it can't have done it any good so i'll chalk this one up in the long list of dumb things i've done with PCs.