Alright, so I built my own computer a few months ago, and everything ran smoothly from the first time I booted it up to a day ago. I was in the middle of gaming and suddenly, my computer shuts off. It won't start up now, no fans move, nothing onscreen (my monitor actually says no signal), nothing, except the onboard power button (which the led lights up whenever power is reaching it) and LED 2 (Called LED 2 cause that's what's indicated by the LED). LED 2 only lights up when it goes from complete power off (like when I unplug the power cord) to when I press the power button to start it up. The light remains on till I pull the plug again. Because there's power going to my LEDs, I would say there's not a problem with the PSU (I wish it was cause they're cheaper to replace than a mobo or cpu.

     I've tried removing all parts, and only using the PSU, CPU, and Mobo, but the same thing happens. LED 2 lights up.

My current build is:

Gigabyte DP67BG Motherboard

Intel i5 3570 Ivy Bridge 3.4 GHz

Rosewill 550 W 80 Plus Bronze Hive-550

EVGA NVidia GeForce GTX 650 ti Boost

Crucial Ballistix Sport 8GB kit (4GBx2)

Western Digital 1 TB Hard Drive

2 Asus Internal disk drives