LG42PQ3000-update

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  • Cornboats
    Dave
    • Oct 2010
    • 232
    • United Kingdom
    #1

    LG42PQ3000-update

    I'm still struggling with this one.
    LG42PQ3000. Standby red to blue. Screen channel identification- full screen for a few milliseconds then Ysus and z sus voltages drop. Sound is there but no picture. Same results when I bridge auto gen.

    Ysus- -vy from -175v down to 3v

    z sus 80v down to 50v

    VS, Va and 5v remain.

    When I disconnect supply from y sus to z sus Ysus voltages remain up.

    When I disconnect Y drive Ysus and z sus voltages remain up.

    I thought it could be the Y drive board but I've had 2 boards from different suppliers

    with no difference to the outcome. Does anyone know the best way to check the Y drive board in case I've been sold duff boards?

    I'm loosing my patience with this one so any help or advice please.
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