I built my first PC a few days ago. I have been using it, and today I was playing a game on it. I closed the game and put it in sleep mode when I came back it was off. I can't get it to turn on( nothing at all happens when I hit the power button ) and I checked the connections I does not look like there are any Loose Or unplugged wires. Please help I just paid 800 dollars for all the parts and I'm freaking out. Could it be a Defective power supply? If so is there a way to see if it's getting power? What else could cause this to happen?