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When I turn on my tv all it has is a thin line that goes across the width of the tv. If you bumped the tv sometimes the picture would come back or you would get a partial picture. It is a Toshiba model # 36A40.

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This is a problem with the vertical circuit. Since a hit sometimes "fixes" the problem, it is likely to be a poor solder connection at the vertical IC. If you can solder and are comfortable working inside the set where there are potentially dangerous high voltages even when unplugged, you can fix this yourself. Locate the vertical IC (small flat IC attached to a heat sink that has markings like LA7837 or something similar.) Resolder the pins of the IC being careful not to short the pins together. Try the set. If that fails to resolve the problem, replace the IC with a new one. The part will cost around $20. Sometimes other parts will be defective as well. Work with the IC first and if there are still issues, the symptom will be different. Update this with any changed symptoms and I'll guide you through the additional steps.

Dan

Posted on Oct 02, 2009

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HELLO

The problem here sounds like dry joints on or around the field/frame output IC. I have sorted this kind of problem before with a soldering iron - some (but not all Toshiba's) seem to suffer dry joints on this part.

Try a resolder. If that does not cure it then the field output IC will have to be changed.

ALL THE BEST WITH THAT! (:-)

Posted on Oct 02, 2009

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