hi i have a MSI 945P Platinum board running pentium D 840. one night pc powered off randomly when i was sleeping. I first suspected PSU, so got another antec 650psu which strangely powered my board. The strange problem is that the board only powers if i dont connected the 4pin p4 12v connection. though it powers only fans spin no display no beeps. i tried my GIEL ram sticks in other machine and it works. what could be the issue?