How can you uninstall a video card driver if you can't see anything from the monitor?

I have a Windows XP with a bad video card (everything is fuzzy/glitchy on-screen). I removed the card and found that it was very hot and the fan had stopped working. I just bought a new card to replace it with and the computer will not recognize the new card. I can see the Dell logo at bootup, but after that there is just black screen. Safe mode (F8) also seems to not work and unresponsive.|||If you can see the logo the card is working. Does your new card require an additional power source if so make sure its plugged in. Also, you may have bumped something loose. Double check and re-seat everything since you have your case open.