Specs: WinXP SP3, Athlon 64 5200+, Gigabyte GA-MA770-UD3, Corsair XMS DDR2 1GBx2, two WD SE16 320GB HDDs, HT Omega Striker sound, Asus 8400GS, Ultra 550w PSU.
As the title says, it will power on but that's it. No BIOS splash or POST. I've pulled the entire system apart checking for any signs of...