OK great question..i am actually doing this with my tv in my room tomorow so here is how u do it...as u have mentioned u already have an S-video output in ur comp (videocard) so all you have to do is make sure that your TV also has an S-video output when u are sure of that go out and buy and S-video cable (i suggest get a higher quality one for the best picture) and connect the tv to your video card using the S-video cable