I have a Pioneer Elite RPTV (53" model, can't remember number). I have recently started experiencing image problems when I view material from digital sources (HDTV and DVD). What I'm seeing are some horizontal lines running across the screen at random intervals, and they move up and down. They aren't always there, but they aren't rare either. Obviously I don't want to see them at all. Has anyone else experienced a problem like this? Any suggestions? The unit is only 2 years old, and obviously cost a bundle. Needless to say, I'm not too happy.