Sigh, so here we go. I recently purchased a Radeon 4850 to replace an older 3000 model that I have currently. I received it last night, but have managed to make a mess of things. Instead of going to drivers and disabling the drivers for the 3000 model, I actually went to Add/Remove Programs and removed the catalyst drivers. After restarting the machine, nothing but a black screen is received even though I can hear that Windows starts fine. I decided to go ahead and put the new card in at this point. After installing it and plugging it up to the Power Supply, when I go to turn it on, the fans spin for a half a second and then the computer does not boot up. Removed the video card out of the slot, but still plugged to the power supply and the machine boots up. Placed the old card back in, and it starts up, but again with black screen. Attempted to plug the monitor into the onboard video adapter and I just get a few BIOS beeps and then the PC turns itself back off. At this point I have no idea what to do to get this new video card installed or even to get the old one working so I can try to do anything. Any suggestions are greatly appreciated, thanks.