Question about RCA 20F424T 20" TV

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Comes on by itself,shutsdown when i change channels

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Try to change the channels without the remote control ie with buttons below the TV set. If it works then you need to get your remote serviced. There might be some stuck keys in the remote.
This may happen at any time or possibly after being on for awhile in which something heats up and drifts out of spec. The low voltage regulator may be letting the voltage rise excessively. Then, a dark picture or video muting during a channel change triggers the X-ray or power supply over-voltage protection.
Monitor the output of the low voltage power supply B+ to see if it is stable as the brightness/scene changes.

Posted on Sep 08, 2009

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