Jumping screen My Sony has developed a problem with the lower 20% of the screen jumping. It is not constant but every couple of minutes. The lower part just jumps up and down just a 1/4 inch or so. Jay

If you have dropped the TV or it has been bumped significantly you may damaged part of the tv tube section where the electrons are beamed. Sounds like a damaged tube to me. If this occurs when you play a videocassette, you need to adjust the tracking of your videocassette player and the screen jumps will go away. I don't have that problem now, but on the bottom portion of the screen there is slight curvature distortion. In the late 1960's Sony TV's made the industry stand on its ear and could stop a shopper for clear across the showroom to take notice. Keep in mind our televisions are almost 20 years. It is "unheard" of for any tvs to last that long. Mine has lasted that long before developing the problem I posted on this e-bulletin board.