I have just bought a new Panasonic LCD TV (TX32LXD500). When I connect my Sony DAV500 to it via s-video I get very little colour and shimmering effects. It works OK when I connect via composite, but I would like to connect via s-video to get the best possible picture. The Panny has a number of SCART sockets of which 2 are labelled S-Video. I have tried to use an S-Video to SCART cable to make the connection. Why is it not working?