I have an ATI Radeon 9000 graphics card. I am having trouble getting it to work with my computer. I have removed the drivers on my previous card. When I put this new card in my computer, it won't boot up. The screen just goes black. Is there anyone that can help me with this problem?

See if this article can help you :

http://www.pcnineoneone.com/howto/bootprob1.html

You say your display remains blank. Does the BIOS give out any specific sequence of beeps? If yes, either the card or the slot are faulty. Otherwise, check that all connections are tight.

hey either the voltage is different from the motherboard, apparantely there are two voltages.
or your bios is set to display pci first (that should show agp second, so this is not the problem).
did you connec the power cable to it??