So I built a computer for the first time, got everything right (at least what I thought). I then had it installing windows and a few programs. After about 3 hours I checked back on it and the computer screen was blank and I could not wake it up. I then turned the power off and now the unit will not boot. I unplugged the gpu and just use what comes on the motherboard, still nothing. I watch the motherboard lights (it has a cpu, dram, hdd, and psu light) that usually go on one at a time, at least it did on the first few successful boots. Now all it shows is the power light on the motherboard. One interesting thing I noticed was the gpu fan is stuttering when I plug it into the motherboard, and it stutters with or without the gpu 8 pin cord plugged in. Any ideas as to what the issue could be? I thought power could be the issue, but I have a 600w supply and it worked fine for those few hours that I cant imagine that be the issue.