I am hooking up my Zenith 318 to my Mitsu 46809 ('02 model). When I hook up to either component input 1 or 2, I get no audio or video, however when I hook up to DTV Component input the unit will play. The only difference I can see is that the Component 1 and 2 input says (480i / 480p YPrPb) and the DTV Component input on the tv says (480p / 720p / 1080i YPrPb/RGB). I am assuming that the RGB is what I am needing for this upscaling 318 Zenith? My problem is that I use my Comcast HD box to plug right into the Component DTV on the back of my Mitsu, so I can not plug the DVD player in there. I do not have a DVI-D input on my tv (I"m assuming it's not new enough). Any ideas on what to do? Am I out of luck and will have to run this unit through S-Video, thus completely making the upscaling portion of the 318 irrelevant? Any help is greatly appreciated!!!