Ibook screen randomly goes dark - would appreciate some help

Discussion in 'PowerPC Macs' started by JoQue, Sep 10, 2010.

  1. macrumors newbie

    Joined:
    Sep 6, 2010
    #1
    regarding ibook g4 running os x 10.4

    The screen on my ibook g4 randomly goes dark sometimes. The computer is still on as the fans are whirring, and I can hear the hard disks etc. While the screen is dark, when I close the lid it sometimes will not go into sleep mode. When it goes to sleep mode, when I reopen the lid, the screen is back to normal. But lately, closeing the lid won't even put the laptop into sleep mode and i'm forced to restart. I have no idea why this is happening. How can I fix it??

    I realise my computer is dated, so I put it in this forum as it's the closest match for the g4.
     
  2. macrumors 68040

    Giuly

    #2
    G4 = PowerPC. So are G3 and G5. You're right in this section.

    However, what causes this is the graphics chip. The solder joint get loose and the screen turns black. You can fix this either by squeezing a penny between the enclosure and the graphics chip, or by resoldering it's connections.
     
  3. macrumors newbie

    Joined:
    Sep 10, 2010
    #3
    Is this a common issue with old G4 iBooks?
     
  4. thread starter macrumors newbie

    Joined:
    Sep 6, 2010
    #4
    thank you.

    It's a relief to hear that it's probably not the logic board. are there any online instructions about how to fix this, preferably with pics?

    @ kona0197: I'm not sure how common this is with g4 ibooks, but i know that this was pretty common with g3.
     
  5. macrumors 6502a

    Joined:
    Aug 7, 2008
    Location:
    In OSX Snow Leopard / Godalming UK
    #5
    unfortunately it is the logic board as the gpu is soldered to it and it is the joints that go, as for a fix i did this for the same problem on a ibook g3 http://forums.macrumors.com/showthread.php?t=672401
     
  6. macrumors 6502a

    raysfan81

    Joined:
    Oct 6, 2009
    Location:
    North Carolina
  7. macrumors 6502a

    Joined:
    Aug 7, 2008
    Location:
    In OSX Snow Leopard / Godalming UK
    #7

Share This Page