I've recently installed a cpu cooler and had to pull out the mobo, PSU, etc. After a bit of a struggle getting through POST everything was working well (playing Metro 2033 last night) but now when I power it on all the fans spin for a few seconds, the mobo power light goes on & stays on, but nothing else happens. I'm sure it's not due to a lack of power - it's a Corsair TX 750W and I've disconnected the graphics card, optical drive & floppy drive - but could there be a fault with it? There are no other obvious symptoms.
Asus P5Q SE Plus
Corsair TX 750W
Corsair 2 x 2048GB RAM
WD 80GB HDD system drive
Seagate 400GB HDD
Dual boot XP Pro SP3/7 Ultimate x64
Is it possible that the 12V rail isn't getting enough power through to start everything up? The mobo light is on (so I suppose the 5V supply is fine) but apart from the fans spinning for a second on start-up nothing else happens. All the connectors look fine and I've re-seated everything but maybe I damaged something when I took the mobo out, although there are no obvious signs (or smells).
Yes, but the fans only spin for a second or two, including the Zalman beast. There are no other noises, no HDD/optical/floppy drive light flashing, no RAM check, no POST whatsoever and no display. The mobo light remains on but otherwise there are no signs of life.
One other thought - although the front panel connectors all look fine at both ends, could it be a fault with the power switch connector? I took off the front panel and it all looks fine but the connection at the mobo end is a bit flimsy. Still, re-seating it doesn't seem to make any difference.