You mean the computer does not POST?
Try this link for beep codes:
http://www.pcguide.com/ts/x/sys/beep/
Make sure you don't have a stuck KB key either

If it's not AGP video card, change the slot or install both cards and see
where you get video.
Michael
"cuevasrbt (removethis) @cox.net" <(E-Mail Removed)>
wrote in message news:283001c4a19f$c5c34fc0$(E-Mail Removed)...
>I recently purchased a "All in Wonder" video card for my
> computer. I started to install the card when I remembered
> that I had to uninstall the drivers for the old card
> before I could go any farther. So, I removed the new card
> and placed the original video card back into its slot.
> Connected all the cables, etc. turned it on and the
> computer screen remained black, the computer made a series
> of beeps (6) (2) (1) and nothing happened. I never turned
> on the computer with the new card in its slot, it was
> installed and then removed without having ever been turned
> on. So I know that the problem is not with the video
> card. Any help would be appreciated.