I have been having some trouble with my P4 system. I have an Intel 2.4C, 1gb ram, Abit IC7, and an antec sonata case. One day when I was playing WoW, the computer just shut off and I can not get it to turn back on. I switched in 2 different PSU but nothing has worked. The little light on the motherboard lights up, but when I push the on button, nothing happens....no fans, no power no nothing. What else could be causing this