After a power outage my pc didn't want to turn on. I narrowed the problem down to my GPU. With it plugged in, my pc doesn't switch on, but if I take it out and use my integrated graphics, it works. My GPU is a GTX 760 OC gaming edition. Its not under warranty anymore, because i sent it back to msi about 6 months ago and they replaced it (the problem was corrosion) I got it back 3 months ago, and now this happens. Is there a way I can diagnose and fix the problem myself? I've tried different cables, and still the same thing. I know it's not my motherboard because I originally thought it was that (one of the wires for my power button came loose and was shorting my system) and I sent my motherboard back and they tested it and there was nothing wrong, that's when I bread boarded my system and found out it was the gpu, and the on button.