Computer turns on, black screen, will not go into bios by holding delete key upon boot. Reseated the Video Card, still no go. Also reseated the memory ddr2 sticks, still nothing. Cleaned and reconnected all the sata drive cables, disconnected hard drives, tried i drive at a time to see if it would boot, still a black screen. Money is tight and I can't seem to find a suitable replacement MB, I need one with AM3 and DDR2...they seem to be obsolete! Running Windows 7 32 bit. ASUS M4N78Pro MB, 4 Gigs DDR2, 4 serial seagate 1 TB HDs, AMD 5400 Video card. Any help would be appreciated ... suggestions also welcome.