I have a graphics card that is a BFG Tech NVIDIA GeForce 9800 GT 512MB. One day I updated my graphics card drivers and all was working fine. An hour later I restarted my computer and I didn't have a display. I couldn't see anything on my monitor. I know that my graphics works because the fan spins. Also I tried using on-board graphics and it worked. Can you guys please help me out on what to do...