Hi, I just attempted to build a computer from the ground for the first time. Up until this point I had only replaced existing parts on a motherboard I had been using for a long while on a store bought computer. Anyways, upon finishing the computer, it will not turn on. Now as I'm a newbie, I'm sure I could have made some wiring mistakes, but I have checked them over and over again using the quick install guide that came with my motherboard (XFX Nforce 750i), and they all seem to be in the right place. I am using a 600 watt power supply, and as the power wasn't working, I thought that maybe this was the cause of the problem. But my power supply works fine with my old motherboard, and not the new one. << This is kind of broad, but does anyone have any thoughts as to why it might not be working?