So i built my computer back in December of 2013 and starting a couple of months ago, when i press the power button it immediately shuts off. Then about 3 seconds later, it turns on. Any suggestions to help solve this issue? I do not know whether it is the case, the motherboard, or even my PSU. My case is a fractal design define r4, Motherboard is a Gigabyte UD3P (amd), and the PSU is a evga Supernova 650.