iBook - Intermittent Video

Discussion in 'PowerPC Macs' started by iPodGod, Feb 25, 2006.

  1. macrumors newbie

    Joined:
    Jun 22, 2005
    #1
    I just purchased an iBook (800MHz, 30GB, 128MB) and the video is intermittent. Often times when I start it up, there is no video at all but it is obvious that the computer has booted up. Occassionally, i'll get consistent video with no problems whatsoever. Sometimes, when I do receive video, there are lines on the screen like a connector is loose. I opened it up and disconnected all the connectors and then reconnected them but i'm not 100% familiar with the internal aspect of the machine so it's likely that I missed something crucial. How can I remedy this problem?

    Thanks,
    Ted
     
  2. macrumors 68000

    amacgenius

    Joined:
    Aug 3, 2005
    Location:
    Buffalo, NY
    #2
    You may be having a common problem a lot of G3 iBook users had, try reading this and see if you qualify - if so - take your iBook to an Apple store and show them.

    If not, then try replacing the display (although your video card could be fried).
     
  3. thread starter macrumors newbie

    Joined:
    Jun 22, 2005
    #3
    Thanks for the link. Will the fact that I opened up the iBook void my chance at getting a new logic board?
     
  4. thread starter macrumors newbie

    Joined:
    Jun 22, 2005
  5. macrumors G4

    Mord

    Joined:
    Aug 24, 2003
    Location:
    Old York
    #5
    when the display go's is it just the backlight, you can test this by putting a bright light behind the apple when it happens, if so you can replace the backlight cable and it will fix the problem, the lines are a symptom of the logic board problem with that you are infact boned, though parts are fairly cheap right now.
     
  6. thread starter macrumors newbie

    Joined:
    Jun 22, 2005
    #6
    It's not the backlight because when I don't get video on the LCD, I also don't get video on an attached external monitor. When I get video on the LCD, I get video perfectly on the attached external monitor. I think all of my problems are a result of a loose/bad cable because when I do get video, there are no lines until I move around the iBook. When I move around the iBook, it sometimes locks up and shows lines. Do you think it's a cable? If so, what cable would it be?
     
  7. macrumors G4

    Mord

    Joined:
    Aug 24, 2003
    Location:
    Old York
    #7
    the logic board problems are caused by the logic board being stressed thus when you move it the little wires in the pcb touch again and it'll have an effect.
     

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