Okay, i was working on my wife's computer, putting in a new optical drive. I take out the old one, get the new one in there, plug in everything properly. When i go to boot it, it boots fine, but nothing coming through to the monitor. We can hear it booting normally, and even setting there on the screen as windows loading(the hard drive spinning for a bit a second time). I tried a known working video card, and a known working monitor with the video card in the old computer. Anyone have any ideas? thanks in advance for any input.