Question about Toshiba 27A50 TV

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Intermittent picture and sound Toshiba model 27A50

The picture plays fine for hours then I get a black screen and no sound with a flashing red power light , the TV will eventually power down. Is this a major problem? Is it worth repairing or should I just purchase another TV (don't want to do that)?

I read online that another person had a similar problem and it was some type of cold solder joint. Does this sound like my problem?

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4 Suggested Answers

  • 1 Answer

SOURCE: TOSHIBA TV NO SOUND NO PICTURE, POWER LIGHT IS ON

I have a problem

Posted on Aug 11, 2008


andyroid85
  • 7 Answers

SOURCE: Toshiba 32a32 chassis tac 245 powers up for 1 secopnd then red power light flashes.

just fixed one with that problem it was the vertical output ic Q301
that was shorted. try wicking it out. it is a LA7833S.
Postings say to be sure to use the Toshiba part

Posted on Aug 28, 2008

  • 2 Answers

SOURCE: Toshiba 36HF71 has sound but no picture

Same problem with mine. Relays click, sound, no picture and a flashing power LED. I finally found a schematic online. I went through the high voltage circuits and found the power transistor 2SC5570 was shorted out. There is also a pico fuse in that area but my was not open. I replaced the transistor and prayed the flyback transformer was not shorted. It wasn't, I'm watching my old 36" right now. Not a bad fix (17.00) bucks. Wonder what a service tech would have charged ;)

Posted on Jun 14, 2009

rhozel2010
  • 267 Answers

SOURCE: Convergence problem... Could it be bad solder joints???

if you have resolder it and still the trouble exist then that is the time to replace the ic.

Posted on Jul 31, 2009

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not the flyback
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it is repairable probally between $75 and $100

what size screen and how old (is it worth it? that your call

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Trimmer, you`ve narrowed it down to a certain section and your absolutely correct that it is a bad solder joint, there are 2 things you can do, first get a bright light and a magnifying glass and go over the bottom of the board and look for it, should be fairly obvious with the magnifier, if not go here and order a can of "Freeze mist" www.partstore.com this is a great "tool" for finding intermittents, it`s coolant in a spray can, have someone watch the screen while you spray in the area of the intermittent, when you hit the bad part the set will work, re-solder the part and any joints around it that look bad, end of problem, good luck with it, BMW Rider

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