I changed cou heatsink. Power lights turn on, DIMM LED and Motherboard LED come on. I tested power supply using power supply tester and it is good. I took motherboard out of the case and connect just cpu and power supply to it. That did the same thing. So I put in POST test card. It gives no error codes at all. Even no lights turn on to show this POST card is working. If i take CPU out then PC doesn't turn on at all (no power lights). So I guess CPU is good. Is my motherboard dead?
Asus Sabertooth p67 rev.3 Intel i7 2600k Corsair 8 Gig chips x 2