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(Topic ID: 277052)

Demolition man display not working, not starting game


By PachoHerrera

14 days ago



Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 8 days ago by PachoHerrera
  • No one calls this topic a favorite

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    #1 14 days ago

    Hello,

    I picked up a demo man with some issues this weekend. Whole host of issues. I am first trying to address a non-working DMD so I can see what other fun errors await. The voltages coming into the DMD are as follows:

    orange pin1 = -116.6
    blue pin 2 = -103.6
    grey pin 6 = + 4.8
    grey-yellow pin 7 + 12.3
    brown pin8 = + 4.3

    The high voltage section of the DMD controller board looks toasty.

    I am wondering if it would be a good idea to send the board off to be rebuilt or purchase a new one, or if further testing should be done before concluding that is the culprint.

    Newer to pinball repair, thanks in advance for your guidance.

    #2 14 days ago

    What are your led lights on the boards doing

    #3 10 days ago

    CPU is not booting when j202 ribbon cable is plugged in. I’m thinking it could be one of the chips on the sound board gone awry dragging down the cpu. The dmd controller board seems to be bad in the high voltage section based on those readings I got. I got a satellite board to get the dmd going, but that doesn’t do me any good if it won’t boot. Any push in the right direction on the j202 issue is appreciated

    #4 8 days ago

    Faulty ribbon cable or unseated chip was the culprit

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