Toshiba 27AF43 27" TV "rolling black white screen" Questions

black and white and goes up and down fast enough to where you can't see anything. Any one know how to easily fix the problem? Thanks. does it roll on normal tv viewing? This is what we call a vertical

black and has a white line or it starts rolling. When I hit it on the side the picture comes back. Not all the time does this work. Can you help me. Thank you, I had the same problem with my TV. It is

...white screen with lines both verticle and horizontal to black or allows me to darken a letterbox movie to where the black level is no longer showing the horizontal lines in the black areas above and ...