Ok, I have a Dell Dimension 8200 desktop and an LCD flat screen. One day the monitor just went black. I thought it was the cord, so I tried using a DVI cable to connect my CPU to my monitor, but it still didn't work. When the monitor is on but not connected to the CPU, the self-test thing comes up on the monitor, and when i connected the monitor to my other laptop, it worked fine, so I think it might be a problem with my CPU. If anyone has any ideas about what's wrong, I would LOVE some advice.