I have a Toshiba 32? TV built in 1994. Model CX32D60, chassis TAC9442. The problem started with the picture being squeezed from both the top and bottom of the screen so that only the middle one-third of the screen had any picture information. It looked like an extreme version of letterbox format. Thwacking the side of the set would cause the picture to revert to normal size. After ten minutes or so it would go back to one-third size whereupon another tap on the side of the TV would set it right again. Once the TV was warmed up, approx. ? hour, the picture would stay normal sized. However, most of the time it would exhibit slight jittering, just enough to make the text crawl at the bottom of the screen a bit difficult to read. But sometimes the picture would lock in perfectly. Eventually this extreme letterbox became a single bright horizontal line in the middle of the screen. I would take to warming the chassis of the TV using a blow dryer aimed through the back of the TV case. Thwack, blow dryer, thwack, blow dryer, etc. This is no way to watch TV. I?ve Googled my TV?s problem and found some solutions on this newsgroup. This NG is a great resource. Thanks to all that post here. There are a couple of electrolytic capacitors in the vertical deflection circuit that lose their integrity with age (heat cycling). The two capacitors mentioned are C305: 2.2 microfarad 50v, and C342: 1 microfarad 50v. I bought replacement capacitors from DigiKey

powrwrap < This e-mail address is being protected from spam bots, you need JavaScript enabled to view it wrote in message I have a Toshiba 32? TV built in 1994. Model CX32D60, chassis TAC9442. The problem started with the picture being squeezed from both the top and bottom of the screen so that only the middle one-third of the screen had any picture information. It looked like an extreme version of letterbox format. Thwacking the side of the set would cause the picture to revert to normal size. After ten minutes or so it would go back to one-third size whereupon another tap on the side of the TV would set it right again. Once the TV was warmed up, approx. ? hour, the picture would stay normal sized. However, most of the time it would exhibit slight jittering, just enough to make the text crawl at the bottom of the screen a bit difficult to read. But sometimes the picture would lock in perfectly. Eventually this extreme letterbox became a single bright horizontal line in the middle of the screen. I would take to warming the chassis of the TV using a blow dryer aimed through the back of the TV case. Thwack, blow dryer, thwack, blow dryer, etc. This is no way to watch TV. I?ve Googled my TV?s problem and found some solutions on this newsgroup. This NG is a great resource. Thanks to all that post here. There are a couple of electrolytic capacitors in the vertical deflection circuit that lose their integrity with age (heat cycling). The two capacitors mentioned are C305: 2.2 microfarad 50v, and C342: 1 microfarad 50v. I bought replacement capacitors from DigiKey

There is obviously a loose connection on a component in the vertical section, or leading to the vertical circuit. With the TV turned on and the back cover off, you need to gently poke around on the board with a non-_meta_llic tool until you touch a component that causes the problem to go away. Or...  with the TV off you should look at the solder joints with a high power magnifier until you find the suspect solder joints, and resolder those spots. If you keep heating and cooling the TV or whacking it on the side, eventually some of the components will fail completely.  If the failure causes a bright enough horizontal line, it can burn into the CRT making a permanent line.  You are on the right track but you must fix it right before more damage is done that you can not repair easily. Since the capacitors were replaced the bright horizontal line has occurred twice

For now, I'd like to solve the thin horizontal line of static that happens at the very top of the screen. This seems to me to be a component that is on the hairy edge of failing