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Powers off after an hour or 2

TV powers off after an hour or 2. Took advice yesterday and took off the back, check all wired connections and all seem OK. Tapped in the circuit board but could not get the TV to shut off to isolate the problem area. HOWEVER< the second i moved the circuit board, the TV powered off...cannot find any dark areas anywhere on the board. with the back off, I can unhook it for about 5 minutes, plug it back up and it comes right back on for an hour or so....any suggestions?

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If the second you moved the board it powered off would really make it sound like a cold solder joint or loose solder connection
they are hard to find, take the board and tip it so you can see it and
move a plastic handle of screw driver over the solder joints while the set is UNPLUGGED and look for and old discolored solder joints and any hair line cracks you can even flex the board to see if you can find it... look very close it will be hard to spot.

Posted on Dec 05, 2007

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TV powers off after an hour or so


Hi Chuck, intermittents will definitely try your patience, It`s obvious the problem is with a poor solder connection or loose plug/connection. It would help immensely if you would tell us make and model number of the set. From your description I would unplu AC cord flip the main board over, get a bright light and a magnifying glass and start checking your solder connections, I`ll bet you have several, check closely low voltage power supply area (where your AC cord attatches to the set) and the high voltage area where the flyback is (large plastic part with large red or black wire coming out of the top), your looking for connections that are cracked or dull grey (overheated) solder, if you need more help keep asking thats what were here for, good luck, BMW Rider

Dec 05, 2007 | Televison & Video

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