UPDATE:
Newegg.com - ePOWER EP-520XP-C1B 520W ATX12V Power Supply 100 - 120V/ 200- 240V UL, CSA, CE, CB, FCC - Power Supplies
that is his PSU, still think he needs a new one?
UPDATE AGAIN: Okay tried a new PSU, and still the same problem.
So I guess PSU is rulled out now...
Oh, and bios are showing the HD as NSFT