I was playing some cs source and then the screen just froze, i figured it had just crashed, and hit the restart button on my pc. It turned off and wouldn't come back on....at all. Nothing happened, no psu fans, no case fans, nothing, except when i turned on the PSU at the back, the network card orange light would flicker, i figured it would be the psu at first, but i tested it in another pc and it works perfectly, am i right to assume its the motherboard? I also thought it could be the cpu but afaik the fans would still spin right?