Ok, so I just got a new graphics card, and in the manual it said to just take out the old one and put the new one in, and then put in a cd which would update the computer with the right drivers. I took out the old video card, and put in the new one. When I turned on the computer, it just beeped 4 times and shut down. I put the old card back in to see if that would change anything, but it just did the same thing again. I can't get the computer to boot in any way shape or form. Help!!