Originally Posted by RBA
The only thing I can think of (and I'm no expert) is the the video card is not seated properly in the PCI slot. Try pulling it out and putting it back in.
Maybe you can take a trip to your local CompUSA and "borrow" a video card to see if it's the card or not. Warning: "There maybe a restocking fee if you return the video card"
Tried the first one already and the second part...I could always swap this 7800GT into that computer and test it out...think that'd be safe? Couldn't afford to cook this puppy....