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Tv comes on and picture goes off after few seconds but sound stays on.

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24vdc power supply or backlight inverter board problem.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

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Posted on Aug 21, 2010

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Posted on Jan 02, 2017

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Sounds like you have a bad picture tube. More than likely the CRT could be shorted, which would cause the set to shut down.
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My Sony comes on then both sound and picture goes black.


After being on a little while, the screen goes black (no audio as well) for 20 to 30 seconds. Green light stays on. Then, picture comes back on and takes a couple of seconds to get up to full brightness. About 5 seconds or so after the video comes back, the audio returns.

Until this morning, has only happened a couple of times a day, now happening more often. About 3 times in last 20 minutes.

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