Trying to build my first computer and I get ready to turn it on but nothing will turn on, not even the fans. The only thing that turns on is a red LED light on the motherboard, I checked the manual and it says that the LED light means its ready to be turned on. I even took everything off except the CPU, CPU Heatsink, I stick of RAM, and hooked up the PSU and still nothing turns on except that one LED light. Any help would be greatly appreciated.