LG 32LH40 LCD t-con or Power board problem

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  • Sevenqi
    Badcaps Veteran
    • Jul 2011
    • 292

    #1

    LG 32LH40 LCD t-con or Power board problem

    I got this TV today, the screen went black sometime after a few minutes, sometime half an hour, but the backlight and everything else works. When it went black, I have to turn off the power and turn on again to get the picture, but repeat the same cycle.
    I suspected the t-con, but why it works after turn off and on? I measured the 12V DC, it reads 11.8v; When screen blank, it reads 11.9v. So I would suspect the 11.8(should be 12v) output is low that the t-con's regulator not working.
    There is no a VR on the power supply to adjust the output voltage, does it matter the 0.1 v difference ?

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