iBook G4 Won't boot up!

Discussion in 'PowerPC Macs' started by crashxb, Mar 5, 2010.

  1. macrumors newbie

    Joined:
    Mar 5, 2010
    Location:
    West Coast, USA
    #1
    I have an iBook G4 which I recently replaced the HD in. I managed to install the software disc that comes with the computer, and start it up with no problem. But then it froze after only a few minutes of activity, and the I had no choice but to reboot it by holding down the power button. I then restarted it, and successfully logged in, but then it froze again after a few minutes. I found that if I left it unplugged for at least 20 minutes or more, and restarted it, I was able to stay logged in for a few minutes longer before it froze. After this happened a few times, for some reason when I started it up, it showed the network icon for a while before switching to the folder with the mac face flashing to the question mark. I've tried booting the computer with several different key strokes, but nothing has worked. And sadly, the start up chime has stopped chiming for some reason, so I can't hear it and have to guess. I've even tried starting it up with the software disc, holding down the command key, or the 'c' key. Nothing works. Any suggestions?
     
  2. macrumors 6502a

    eRondeau

    Joined:
    Mar 3, 2004
    Location:
    Canada's South Coast
    #2
    Maybe open it up again and re-check all the wiring connections? And pull the memory modules out and re-seat them. Couldn't hurt....... :apple:
     
  3. thread starter macrumors newbie

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    Mar 5, 2010
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    #3
    I've reopened it several times, and all the wires are connected.
     
  4. macrumors 6502

    msjones

    Joined:
    Oct 18, 2007
    Location:
    Nottinghamshire, UK
  5. thread starter macrumors newbie

    Joined:
    Mar 5, 2010
    Location:
    West Coast, USA
    #5
    Yes. But I don't know if maybe I'm not hitting the keys at the right moment, because there's been no change in the way it boots up. It always goes to the folder flashing back and forth from the mac face to the question mark.
     
  6. macrumors 6502

    msjones

    Joined:
    Oct 18, 2007
    Location:
    Nottinghamshire, UK
    #6
    check here: http://support.apple.com/kb/HT1379

    You should hear the startup chime, then the screen should go black because the machine is rebooting then another chime and hopefully a boot into the desktop.
     
  7. thread starter macrumors newbie

    Joined:
    Mar 5, 2010
    Location:
    West Coast, USA
    #7
    Like I said before, I'm not hearing the start up chime anymore for some reason.

    Even when I do exactly what it says, "Reset the power manager by simultaneously pressing and then releasing Shift-Control-Option-Power on the keyboard. Do not press the fn (Function) key while using this combination of keystrokes." when I turn it back on it goes back to the folder with the mac face.
     
  8. thread starter macrumors newbie

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    #8
    I left it on all night, to see if anything different would happen. When I woke up this morning, the folder on the screen was gone, and it's flashing through a sequence of colors. Does this mean anything??
     
  9. macrumors 601

    OrangeSVTguy

    Joined:
    Sep 16, 2007
    Location:
    Northeastern Ohio
    #9
    Sounds like you have the very common logic board problem. Firmly press on the bottom near the battery release lock. There's a little chip in there that gets micro-cracks in the solder connections from the logic board flexing. When you changed the hard drive, you more than likely put more stress on it and caused it to flex. I've had about 5 iBooks with this problem before and there's no permanent fix besides replacing the logic board.
     
  10. thread starter macrumors newbie

    Joined:
    Mar 5, 2010
    Location:
    West Coast, USA
    #10
    What's supposed to happen when I apply the pressure? I really hope it's not my logic board, I really can't afford anymore repairs, or parts and I really need the mobility that comes with a laptop. *sigh*
     
  11. macrumors 601

    OrangeSVTguy

    Joined:
    Sep 16, 2007
    Location:
    Northeastern Ohio
    #11
    It's supposed to push that chip back on the board making it run/boot.
     
  12. thread starter macrumors newbie

    Joined:
    Mar 5, 2010
    Location:
    West Coast, USA
    #12
    Well I've been pushing, but it hasn't made a difference. :confused:
     
  13. thread starter macrumors newbie

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    Mar 5, 2010
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    West Coast, USA
    #13
    So in my desperation, I've managed to get the blue screen with the refresh arrow and the continue arrow to come up by holding down the Option key. But the install disc isn't showing up, and neither is the HD even when I click on the refresh button. What can I do to get the disc to show up?
     
  14. macrumors 68040

    California

    Joined:
    Aug 21, 2004
    #14
    You have the famous video chip problem.

    You need to shim the logic board yourself (google around for ideas on how others have done this) or have the board reflowed by a professional.

    You actually apply pressure to the left of the trackpad from either the palmrest or from underneath the case.
     
  15. thread starter macrumors newbie

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    Mar 5, 2010
    Location:
    West Coast, USA
    #15
    I've been applying pressure to those areas, and there has been no change at all... Does I definitely need to shim the logic board?? :confused:
     

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