I've a new set up with a Hitachi C32WF727N TV with a Denon AV-F100 stereo. I'd noticed that when playing DVD's (s-video) I could sometimes see 2 horizontal lines on the picture. These lines are most noticeable against skin tones where they appear to be slightly green. They also move up and down slowly over time. I thought this might have been some problem with the DVD, but I noticed the same problem with the composite output from my PS2 with feeds into a different AV socket on the TV. However, the really telling thing is that if I've got the TV set to the digital sky input (a third AV socket) If I press the 'tv' button on the remote I see these lines, but if I press the 'sky' button the picture shifts suddenly and I don't see any trace of these lines. Does anyone have any idea what could be causing these lines and how I might go about getting rid of them?