I just finished my new build and when I hit the power button nothing happened. My reading says it's either a bad power supply, bad power switch or bad motherboard. Are there any other possibilities. I get nothing not even a spinning fan. When I was installing the CPU. I bent some pins but unbent them and everything looked good. The CPU seemed to seat ok. I also read that a bad CPU will keep it from posting but it still should power on. I tried the screw driver on the power switch pins trick. I have this power supply LEPA G1200-MA 1200W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Power Supply. I just so happened to have gotten a power supply tester to test another power supply so I can check when that gets here. It was working fine when I pulled the old motherboard. It is about 5 years old but didn't see heavy use. The new MSI mb is an X470 Gaming Plus Max. It has an eight pin and a four pin motherboard power connection. I have the 8 pin plugged in but not the 4 pin. My understanding is that the 4 pin is only necessary for overclocking. Any other suggestion as to what the problem could be or what other steps before I blame it on a bad motherboard?