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  1. #1


    Member Since
    May 12, 2011
    Posts
    3
    Question Imac G4 20 Inch display issues, inverter maybe?
    I have been given a 20Inch Imac G4, its very nice.
    But there is no display on the screen, I have shone a torch on it and can not see a image when booted up, However I can see the backing light.
    Plugging in an external screen works fine so the logic board should be fine (As far as I know)
    I have been able to load the install disk to 10.3 using the external screen.
    Im only asking because when I search it seems that normally if its a dead inverter there is no backing light on the screen but there is a image but I have the opposite.

    Any advise would be greatly appreciated.
    Thanks guys - Jeremy

  2. #2

    Stretch's Avatar
    Member Since
    Jan 13, 2007
    Location
    Central New York
    Posts
    4,773
    Specs:
    15in i7 MacBook Pro, 8GB RAM, 120GB SSD, 500GB HD
    There might be a loose connection on the display, or the display might be gone.
    Blog and Photo Gallery: http://philolin.me/

    Currently running OS X 10.10

  3. #3


    Member Since
    May 12, 2011
    Posts
    3
    Thanks for your quick reply
    Do you think that having the backing light on the screen rules out the inverter?
    Ill try to open it up and see if I can move the connections around.

  4. #4


    Member Since
    May 12, 2011
    Posts
    3
    I took apart and put back together all of the connections from the motherboard to the neck of the computer.
    It didn't change anything.
    There is a component on the motherboard that makes some weird sounds after boot up and the back light is on for a little bit. I made a short video of this and showing the screens backing light going out as I turn off the computer.
    YouTube - Imac G4 20 inch no display and emmiting noise

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