MB is out of the case, nothing conencted to it but mem, cpu, cpu fan, and vid card. I can turn on the power switch on the back of the power supply (not the tower) and I'll get power (fan spins, lights on MB), but no POST and I can't turn it off using the power switch on the tower. No beeps either on power up.
I've changed the power supply, did the CMOS trick (taken out for 20 mins), and even flashed the bios with a flash drive, still no go. Took out everything but the cpu and the fan, same thing.