iMac G4 20" LCD...troubleshooting help?

Discussion in 'PowerPC Macs' started by fhturner, Mar 8, 2011.

  1. fhturner macrumors 6502


    Nov 7, 2007
    Birmingham, AL & Atlanta, GA
    Hey Folks--

    Wondered if y'all might throw in your opinions and $0.02 about some bad behavior I'm getting out of the LCD panel on a 20" iMac G4. Basically, it seems like the "opposite" of an inverter failure:

    • Rather than the picture being there w/ no backlighting, there's backlighting present w/ no picture.
    • Video out works just fine.
    • I replaced the inverter anyway, and it made no difference.
    • I have jiggered the TMDS connector on both ends, and do not see any changes when I do so.

    Any thoughts? Does this sounds like a cable problem or the panel itself? Unfortunately, I do not have another similar machine to test with.

    Thanks for any tips!
  2. Meppeler macrumors newbie

    Mar 5, 2011
    Meppel (The Netherlands)
    any luck?

    Hi there,

    I wonder if you had any luck?
    I do have the same problem.
    Just bought an Imac g4 20".
    because it's a fine looking machine.

    if you did not have any success:
    there's a guy on the internet who
    has made quite a few mods on the Imac G4
    e.g. he replaced the original screen with
    a standard 20" lcd screen and attached it to
    the neck.

    The Netherlands

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