Question about Sony KV-32XBR250 TV

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Sound, no picture...please help!

Like others on this forum, I am experiencing the 'sound, but no picture" condition. Someone mentioned that there were 'a few things' that could be tried, but never said anything else. Can anyone elaborate on these 'things', please?? Thanks so much in advance!!

D.W.

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  • Sony Master
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(Pasted from the one before -)

Since I can't see your screen, I'll guess.

If the picture shrinks away in the vertical, fast or slow, it is in the vertical control circuit.

If the whole picture shrinks in both axes simultaneously, the high voltage circuit is the culprit.
This section is responsible for producing the accelerating voltage for the beam so if it is dropping out (quite common after years of use) there will be nothing to speed the beam to the phosphor to produce light.

Turn up the intensity when the picture drops out to see if you have any trace of light.
If not, it is the latter problem.

If you can still see a horizontal line that flickers a little (from video content) then it is the first problem described.

IF the flyback (HV) transformer is still available, it will cost somewhere between $25-$100 US (many lower cost sources have disappeared) plus labor.
Depending on whether the fault was the flyback or the high power transistor that drives it, there could be additional parts needed.

Since you indicated that it operates OK for a while, it could also be something as primitive as a failed solder joint and these can be tough to find (=$$ labor).

Posted on Jun 22, 2008

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