Panasonic 55DX600u second fault - panel brightness pulsing on right side

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  • fixxy88
    Member
    • Feb 2023
    • 27
    • Australia
    #1

    Panasonic 55DX600u second fault - panel brightness pulsing on right side

    After getting the backlights up and running a second fault has emerged on this TV. I was going accept defeat and move on but thought I'd have a quick look at it in case it was something simple. The right side of the display exhibits a panel brightness (not backlight brightness) pulse every 2-3 seconds in a stable timing.

    I poked about on the TCON test points and found one voltage that is fluctuating in the same pattern. VGH-ODD (Pin 47 of U10) is sitting at ~-6.5v then goes up to ~28v when the brightness pulses then goes back down to ~-6.5v again in a repeating pattern.

    Aside from feeding in an external 28v and probably damaging things, I'm out of ideas and any help here would be super appreciated. Cheers
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