Question about RCA F27669 TV

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Sound on (and good) Picture off

This issue just started in the last week or so. While watching TV after a considerable amount of time the picture goes out but the sound remains. It's as if I turned off the TV. After several minutes the picture comes back on. The vents are clear as best I can tell so I do not think it is over heating. Is a part failing? Is their a simple solution? I was hoping to keep the TV until analog broadcast signals have been taken back by the feds. I simply can not afford a new TV much less a HDTV flat which I really want at this time. Anyone; ideas/help.

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Re: Sound on (and good) Picture off

Check and resoldered the suspected loosen part. this could happen the TV may turn normal at first to turn on after few seconds it is getting heat the suspected loosen part may totally open. resoldered the board at the secondary area near around the flyback. good luck!!

Posted on Feb 12, 2007

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Re: Sound on (and good) Picture off

If you can solder and have good eyesight, you're in luck. That is a classic symptom of a bad solder connection leading to the base of the Horizontal output transistor, labeled Q14401 or possibly Q4401 on the printed circuit board. This transistor is mounted to a aluminum plate heat sink near the high voltage transformer with a red wire coming out of the top of it. First Unplug the set. You will then need to follow the circuit trace from the 'B' connection of that transistor back to a coil of wire labeled L14401 or L4401 and you will find that one of the two connections there will be loose. Resolder that and you should be all fixed up. You may also find a bad solder connection or two on the pins of the high voltage transformer. A good magnifier will definately help. Good Luck.

Posted on Feb 06, 2007

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