Okay I recently built my computer and had it for about two months until I came upon this problem. My computer would power on and all my fans and lights work, but the system will not boot or beep once like it normally would and my monitor stays blank. The strange part is that if turn off the system and unplug the 4 pin connector by the cpu, then wait about 5 seconds and reconnect it, the system boots up and runs normally until I power it down and try to boot about an hour later.
I'm assuming it might be a problem with my motherboard or psu
AMD Phenom II x4 965
EVGA GTX 460
4GB Corsair XMS3 2 x 2GB DDR3
OCZ Modxstream-pro 700w modular power supply