Question about Sony KV-32S42 32" TV

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Blinking picture After turning on the TV, the picture blinks off and on for awhile until it warms up for a few minutes.

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  • EPractical Feb 14, 2009

    My Sony TV, same model and size, has the same exact problem which started couple months ago ! I thought it was either a TV and/or Cable setup problems, but numerous trial later I still have the same problem !!!

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HI
Hold on a second, if the picture is good when its there then the crt is not bad, what more than likely needs to be done is adjust the Screen Control on the back of the CRT Board up just a tick, I've worked on alot of these tv's and 9 times out of 10 thats the problem, however a qualified tech should do this.

Mark

Posted on Dec 01, 2007

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  • Master
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Common problem on older SONY = BAD CRT ....replace TV.
..........................................T.

Posted on Nov 30, 2007

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1 Answer

Our Sony picture came on one day & after a few minutes the screen went black, the sound was still there & the stand by light was blinking away. After waiting awhile we can still turn the t.v on, ...


often it is cold solder in c-board. have you tried to re-solder it..in few years of using your t.v it is normally electronics parts heats-up..then it will loose it contact from the base board or the PCB.
if you have a basic electronics knowledge and good soldering skills you can do fix it right away.
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Guess I should have looked throught the next couple of posts... The problem you have there you will not be able to repair yourself but a good shop can fix it temporarily. The CRT (Cathode Ray Tube) or picture tube is shorted, that's what is causing your blinking. You can call around and ask a shop locally if they can rejuvenate it for you using a crt analyser. In the shop here we use a BK467 which would fix the problem for awhile. What they will do is take the back off and hook-up the analyser and remove the short temporarily. That fix could last weeks or even months, in most cases though never more than a year. Turn the RV1791 back down, it has nothing to do with the G2 voltage and you don't want to overdrive the crt anyway. Take it back down until the horz. lines disappear in dark scenes or background. Then take it in and have the picture tube rejuvenated. Then start shopping for a new Tv... You'll need one eventually but this will buy you a little more time.
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William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993
premtech@willapabay.org

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1 Answer

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This should be a quick fix. Try resoldering the vertical IC. This is a small flat IC attached to a heat sink with about 11 pins. It should be marked LA7837 or something similar. That should resolve the problem.

Keep us posted.
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1 Answer

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Hii.... first I like to know the chassis of yor KV27FS100..
sound like problem with regulated parts block.....and can more helpfull if you count the blinking of the LED....sony have selft diagnostic at the LED Blinking.....

I hope hear from you soon....

Thank's


[Vrya]

e-mail : be_cek@yahoo.com

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1 Answer

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Sony has a code for those blinks indicating the problem area. Count the blonks till the pause then google Sony blink codes for the area to fix.

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2 Answers

Blinking picture until warmup


On Sony TV's they monitor the current drain on all three electron guns Red Green and Blue. Until all are somewhat equal it will keep the CRT blank. As the set ages it means that it might flash a few times until the cathodes are good and warmed up.

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1 Answer

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No you didnt answer the most important questions> When the tv"blinks" does the sound go on and off with the picture? Or does the picture go out to a black screen or a grey screen? or does the whole set seem like its shutting off and on again? or does ir seem like the tvs trying to tune in a channel but keeps going past the right frquency? Answer these questions and we can get somewhere.

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