ColecoVision blackscreen

Discussion in 'Repair, Restoration, Conservation and Preservation' started by relo999, Jun 17, 2014.

  1. relo999

    relo999 Robust Member

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    The wiring on the underside is to redo broken connections created by removing the IC's to violently as wick didn't work.
    The IC's that I replaced was the TMS9928A with the CD4516BE. But I've just tested/ordered MK4516N-15 (becuase CD4516BE I saw that it had the wrong pinout and probably different type of IC) as those are mentioned on the mod page, just to be completely sure to use the correct IC.

    But I still get only a black screen, but now do get a tone quite consistently.
    What I think is weird, and I have mentioned it before I think, is that I get the correct channel on multiple channels. And the weirdest is that the best (only one with a tone I think and no noise on the black screen) channel is on 57 MHz, seeing how it is a german colecovision that frequency should be radio (and unpickable by most, if not all, mid/early 80's European TV's).
     
  2. relo999

    relo999 Robust Member

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    Could anyone confirm that it working multiple channels isn't normal for a Colecovision? Or how I could possibly fix it if it's not normal.
     
sonicdude10
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