I have a strange fault that I wonder if anyone has seen before? It happened while watching TV, suddenly I got vertical lines and I see a small part of the actual programmes at the top as a horizontal bar about an inch high. Sound is ok, Remote control works.. Just the picture is faulty. I've taken it apart and visually inspected all the caps, no one seems obviously blown but that is of course not conclusive. Before I start yanking parts I'd thought to ask here if anyone has seen this before?