Hi, this might be a dumb question but here goes. I have been reading here in some threads that I may get a better SD picture by hooking up the S-video cable instead of the component video. I have a Panasonic TU-HDS20 STB with an Hitachi 57 in. HDTV with the component cable connected to Input 1 on he TV, I tried to connect the S-video cable and audio cable to Input 3 on the TV. I get audio & video on Input 1 (Component) but I only get audio on Input 3. could anyone help me in what I'm doing wrong and can I have 2 inputs from 1 STB. Thanks in advance.