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lg 50pk550, my unfixable challenge!

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    lg 50pk550, my unfixable challenge!

    Ok I've posted about this set before, but I want to diagnose it further. I found my harmony 880 remote that I almost threw in the bin many time so now if people can help me out I might be able to diagnose it better.

    Heres the rundown.

    Ive fixed the power supply more than a few time now, recap and the 3br chip.
    Ive had the resistor blow on it 3 times. I have since most mosfet on that board.

    Ive been able to make it work for a while, except when a very rapid change of screen. ie: getting killed in a game.

    Lately a z buffer failed, the lower one. Tv worked flalessly with that lower Z board disconnected.

    I replaced the lower one, it worked a few hours. Next day, it's back to double clicking, one second screen then off again.

    I just replaced the upper z buffer, no effect, as expecting. Still double click.

    AS mentionned, I have the harmony 880 and highly suspect the z substain ( the big guy feeding the buffers. Unconnected, it boots. I either have low or weak Vs or bad component on the z buffer pulling too much sauce.

    Correct me if im wrong

    #2
    Re: lg 50pk550, my unfixable challenge!

    oh and I replaced the 5 large capacitor on the z sub and the 5 on the x sub

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