Few things can be as frustrating as picture problems. You get your system all ready to go, flip the switch, and WHAM! One or more channels look terrible. The good news is that the majority of video problems can be traced to just a few causes. Most problems are comprised of the following:
Snow
Horizontal bars rolling though the picture
Vertical bars rolling through the picture
Ghosting
Herringbone pattern (diagonal lines through picture)
Lower channels look fine, upper channels are not
These six are the main symptoms you