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I have a lg55la6200 led/lcd smart TV. When I turn it on it stays on for about 15mins and then the screen turns off but sound still on. I have done the flashlight test and can see the picture.

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wholesale Samsung BN44 00715A L55G2Q ESM PSLF151G06A Power Supply Used

Posted on May 11, 2017

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Posted on Apr 22, 2017

  • Jared Whitby
    Jared Whitby May 01, 2017

    Thank you. I have tested each individual led and they all light up so I replaced the power board and still have the same problem. Does the main board have anything to do with leds as the led driver in this model is only built into the power supply and the main board is separate any help is much appreciated

  • allan wang
    allan wang May 11, 2017

    https://www.abctay.com/index.php?main_pa...

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