Motherboard power switch pins having issues?

Friganometry

Honorable
Nov 28, 2013
4
0
10,510
Hello, everyone.
My computer (Motherboard: MSI-P67A-C43 (B3), Graphics: AMD HD Radeon 6770, RAM: 4GB PNY RAM, PSU: Thermaltake TR2-600W, CPU: Intel Core i7-3770k) has been shutting off abruptly for no reason. I left the house for a few hours and left it on and when I returned it had shut off and wouldn't power back on. I opened it up and everything was secure, but when I plugged the power switch cable directly into the motherboard, it turned on. It stayed on for a few minutes, but turned back off. I left it alone for a few days and it turned back on, so I was emulating a GameCube game which is pretty intensive on the CPU, and it shut off and hasn't turned back on since. I tried my old processor to see if the processor was the problem, but it still didn't turn on. I've tried it without all the components to try and troubleshoot the problem, but no luck. Is this a problem with the motherboard, is it overheating, or is it something else?
 

Friganometry

Honorable
Nov 28, 2013
4
0
10,510

I don't think the power supply is the problem, I did the paper clip test and the fans turned on. Also, if it was the power supply, I don't see why it would turn on, shut off abruptly, and then turn on again a few days later.