Vostro 3460: Stuck at Dell Screen, cannot go into F2 or F12

Please Help,

Windows 7 wont boot past dell screen,
if hit F2 or F12, shows preparing to enter setup, but never goes past that point. 

Boots to boot setup if HD is disconnected, then if boot sequence changed to CD and try to boot from Win7 CD, works. But cannot do a start up repair since hard drive is disconnected.
Tried connecting back HD, stil does not go past dell screen. 

Also tried updating BIOS to 3460_A13 or 3460A19. neither worked. 

Please help.