I have a samsung 50" plasma and recently I have noticed faint scrolling lines on dark images no matter what source is being used. I assume this is interference so I have tried a number of things to try and source it. Despite turning off all other appliances in the near vicinity, the scrolling lines still stay. The only thing I can find that has some effect on it is by disconnecting the scart from my cable box. This actually makes the problem worse though as instead of around 4 inches between each of the scrolling bars, the amount of lines increase and there's a line every 1 inch instead which is far more noticable. I have tried replacing the scart cable which make no difference but strangely enough even if I turn my cable box off completely (and remove the coax cable it is fed by) the lines still stay leading me to think they are not caused by the box at all. Can anyone help?