Custom built PC won't boot up. When you press the power button the machine tries to power on (the fans spin for about half a second) but after a fraction of a second the machine powers off. I have tried three different power supplies. Same problem. I think its either the mobo or the processor but I'm not sure which. Its been a long time since I've had to troubleshoot a PC. Is there anything I'm missing? Am I going to have to buy another processor and troubleshoot this thing further that way?
Asus A8N-SLI / AMD Athlon 64 X2 3800+ Manchester 2.0GHz / Corsair XMS 2GB DDR 400