Video problem on 12" PB G4

Discussion in 'PowerPC Macs' started by jruschme, May 28, 2014.

  1. jruschme macrumors 6502

    jruschme

    Joined:
    Dec 20, 2011
    Location:
    Brick, NJ
    #1
    Recently, I decided to get my 12" PB G4 (1.33ghz) off the shelf and fire it up.

    Basically, it is working fine except for a completely black LCD. The backlight seems to work fine. Video is displayed correctly on an external monitor (so I don't think it's a GPU issue). Just nothing on the screen.

    No obvious damage. No drops or falls since the last time it was working. I'm at a loss.

    Thoughts?
     
  2. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #2
    It could be a disconnected or faulty LVDS cable. It connects to two places, the LCD screen and the logicboard. First try resetting the PRAM. What does the sleep light do during this whole process?
     
  3. jruschme thread starter macrumors 6502

    jruschme

    Joined:
    Dec 20, 2011
    Location:
    Brick, NJ
    #3
    I need to look up the PRAM reset.

    As for the sleep light, it seems to behave as it should- sleep on initial close, wakeup on external keyboard.
     
  4. MrPilot macrumors 6502

    Joined:
    Apr 30, 2013
    #4
    I agree. If the PRAM doesnt fix it, maybe you need to wiggle the cable to the logicboard so that it may reconnect
     
  5. jruschme thread starter macrumors 6502

    jruschme

    Joined:
    Dec 20, 2011
    Location:
    Brick, NJ
    #5
    Tried the PRAM reset... no change. Also tried the PMU rest with no change.

    I think we're definitely down to the cable or LCD.
     
  6. California macrumors 68040

    California

    Joined:
    Aug 21, 2004
    #6
    I've got a working screen and 12" lid with all the works. Let me know if you need it.
     

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