Madcatz

ok, next step, unhook all devices from the motherboard, as in IDE/SATA cables, any PCI cards, USB port plug ins (well as long as they are one plug and not a connector for every little wire) only thing you want hooked up is video, memory, PSU connector on mobo and processor. see if that does anything for you.

if not also try swapping out memory, take a stick out and try it, move the stick left in to another slot and try it, then swap the sticks and do the same thing. all else fails, take all memory out and power it on and see if you get three beeps from the mobo.