Can someone please help me? I have a GeForce 7800 GS OC and I'm running the Windows XP Media Center Edition Version 2002 SP2. A while back I upgraded from an ATI Radeon 9200mce to my 7800 GS OC, and everything was good until I tried to use the s-video out. After that my computer restarted, the screen went blank and wouldn't work until I changed back to my old video card. Can someone please help me fix this problem, or is it supposed to work like that and there's just something that I don't know?