Came home from work today, to find my PC on, but no display, and my mice/keyboard lit up as usual so I rebooted, and nothing happened (I dont have a PC speaker so no beeps) motherboard's giving an error code of "00" and the CPU LED is on. I tried swapping vid cards, swapping memory in and out, swapped PSUs, nothing worked, according to Asus' site, and various things I've read, if the CPU light is lit, then the CPU is bad, probably, tho I have no way of testing these two items. I've tried both bios chips as well, and resetting the bios.
Intel Core I7 3820 (not overclocked)
Asus Rampage IV Extreme
4x Mushkin Enhanced Redline PC3-17000 2133 (not overclocked)
Noctua NH-D14 cooler
Enermax EMR1350EWT Maxrevo 1350W PSU
Windows 8 Pro