well if you hear only sound, that means you havent set up the computer so you can see the picture. Under the control panel, type "multiple moniters" in the search box, and that should give you step by step instructions how to set it. On my toshiba, I just press the "fn" buttton and F5 button, and that gives me options as to what moniters I want to view. On windows Xp though, there was an opton to view only certain windows on the tv at a given time, it was more complicated and had a lot more options than windows vista, but I only set it up once and I could actually see my whole screen on tv everytime I hook it up, if I start playing any kind of media, the tv focuses solely on that. BUt with windows vista, the font and everything on my computer screen gets huge if I chose the option to view on tv, and on the computer screen, so when I'm not hooked up, I have to make changes so that the screen resolution looks more realistic on the comp. and its' pretty damn annoying to keep doing that . It doesnt allow me to multitask either, so whatever I'm doing on the comp shows up on tv, even if I have media on