Had the same problem.. for me it ended up being the power supply.. and in turn it wiped out my motherboard. I replaced them both and all was fine.

Got a high quality Antec Power supply to try to avoid this in the future.
daihashi Reviewed by daihashi on . need help from ppl who know computers alrighty i was playing WoW on my pc.Then when i was in a battle mi pc shutoff by itself so i turned it back on and mi pc went to mi pc login in then it shut off know it wont turn on when i press the power button mi fans move alittle and mi light flashs and thats it......I have no clue whats wrong with it any advice on how to fix would be great thx....... PeAcE Rating: 5