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Sony TV shuts off automatically

My 29 inch Sony KV-SZ29M80 TV, shuts down automatically after variable period of running. It started after a power fluctuation probably. before shuttin down the picture gets horizontaly compressed and collapses in the center. on some tv channels it occur early and on same after delayed period. The channels on which it occurs usually have the TV's displayed channel number (top right corner) to become distorted
my local tv repair man has told me that the problem is with the main bord of the tv but he could not sort it out

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1.Check first if the shutdown of your tv follows a certain period of time. Example after using it within 12 hours it automatically shut down. If so the the matter is only on settings of your tv.
2.But if your tv shut down at an irregular time the problem is in your board. In this case if your tv still work but still shutting down automatically its better not to use it so that their will be broader damage.
3.The most common defect on this case is loss contact of components due heat and mechanical undergone during the usage of the tv. If you know how to resolder board, try to resolder the components specially those who are showing loss contact. You can recognize it because a good solder one has shinny and no round like on the soldered surface.Try also to resolder important parts such as IC's and transistors. note : a good resolder needs to be done in order to avoid problems and damage.
4.Another possible cause is the tack switch for channels,menu,power and etc. You can remedy it by spraying it a contact cleaner.
5.If the problem still going even after the procedure its better to bring it on reliable and trusted service center.

Posted on Jul 11, 2009

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Posted on Jan 02, 2017

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