Question about LG Televison & Video

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Our LG TV model CT-29h32en twice a week will turn off to black screen with thick white line across the screen. We turn the set off and wait 5 minutes and turn back on and all is OK. If we turn back on immediately it returns to the black screen and white line. All with no sound.

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  • ken2582 Aug 29, 2010

    Thanks for the clue. I will inform our repair man.

  • ken2582 Aug 30, 2010

    I will inform my technician...so he doesn't go round the long way, like some taxi drivers. lol

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  • Master
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You have faulty electrolytic caps on the main audio/video board. A component level repair might be possible. Do you have any prior experience in working on electronic circuits? Can you solder and/or use a multimeter(with capacitance measurement if visual identification of faulty caps is not possible)?

Posted on Aug 29, 2010

  • eagle338
    eagle338 Aug 29, 2010

    Sure. Please do accept the solution if you find my advice helpful.

    Sai.

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  • LG Master
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That thick white line is the normal image that is squeezed vertically because the vertical deflection unit has stopped working.The only thing that the vertical deflection unit and the audio amplifier unit have in common is the power line - they are the only ones that use the 25 volts line so when that fails both units fail.
Since this is an intermittent fault that means that is caused by a bad contact - the tv must be opened, the 25 volts line identified and all solderings on it redone. Basic stuff - if you have done a soldering of before. If not, then you might do a lot of damage by accident so call a repairman, you will pay only for its labor since no parts are needed.

Posted on Aug 29, 2010

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