So yeah, I just changed my graphics card from nvidia gt 220 to an nvidia gtx 460. Everything went fairly well first, the card fit in and everything. When I decided I'd put the old card back in to remove the drivers, and that's when the problems started.
Computer starts up, but there's no video signal and I hear a long beep and two short ones after it. Tried to google around a little but haven't actually seen any solutions. This happens on both cards, so I'm guessing the socket is faulty? What could I do in a case like that? Also I don't think the cards are loose or anything, they don't really budge any more than the 220 did when I tried it before.
Hoping I didn't manage to break two cards in some muppety fashion.