The JVC is the likely source here. Or the DVD. Try a few more DVDs before you ask JVC about this.
We purchased a westinghouse TX-42f430s LCD TV and a JVC TH-D50 home theatre system with hdmi output and 720p/1080i video upscaler. When watching a dvd with the hdmi connection, there is a noticeable thin line down one side of the tv that appears to change colour. This line dissapears if the tv is switched to fill mode, but then the aspect ratio is wrong. This line is also only visible when the actual movie is playing, not the previews, etc. I have tried different hdmi cables as well with no change. Westinghouse told me to try the ypbpr cables (another expense) and JVC told me to try a different hd source (i live in a rural area and don't know anyone with a hd dvd!) Any one recognize this problem? any suggestions? Other than the line we are satisfied with our components but would to get the most from them possible!