There is a little problem with my SCART inputs on my 25" Philips TV. When I connect a video source to it (any video source), both with composite and RGB, there is a slight picture imprefection, wich does not apppear with the RF input. This is a bit hard to explain, but I will try to specify it; from a distance, the picture seems OK, nothing strange. However, if I look a little closer, I can see a kind of an interference in the picture; it's slightly unstable. There seem to be like waves going all over the screen, which makes especially vertical lines look a bit "wavie" and unstable. What is a little strange is that through the RF input, this problem doesn't occur. So I'm thinking if there might be something between the SCART socket and the monitor part of the TV that disturbs the signal. Does anyone have any idea what might be the reason for my (slightly) unstable picture, and how it can be fixed?