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My PowerBook G4 will not start up.

667 Views 4 Replies Latest reply: Jul 29, 2011 9:24 AM by old comm guy RSS
Carolynjoy1228 Calculating status...
Currently Being Moderated
Jul 28, 2011 9:21 PM

I press the power button, it chimes, the gray screen comes on, the apple shows up, but then it goes black and powers off again.  I tried taking the battery out, unplugging it, and holding the power button down, as was suggested.  I can't get anything new to happen.  Should I just take it in to the Apple store to try to salvage the files?  I was hoping to get the files out myself and onto an external hard drive.  But I can't get in to turn on or stay on long enough to get the files off.  Any ideas?

PowerBook, Mac OS X (10.4.10)
  • old comm guy Level 4 Level 4 (2,230 points)
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    Jul 28, 2011 9:48 PM (in response to Carolynjoy1228)

    Specifically which model of PowerBook?  Screen size, CPU speed, Aluminum or Titanium?


    How many green LEDs show when you press the test button on the battery?


    When the battery is in and the power adapter is connected to the book, do you get a green or amber LED indication?


    We can go farther when the power situation is described.

    TiBook G4 1GHz/ G5 2 GHz DP GF Ultra 6800, Mac OS X (10.4.11)
  • ciccino Level 1 Level 1 (5 points)
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    Jul 28, 2011 11:53 PM (in response to Carolynjoy1228)

    It is probably something about charging circuit/power overheat issue. The powerbook turns off itself because of that. Replace charging circuit ;-)

  • old comm guy Level 4 Level 4 (2,230 points)
    Currently Being Moderated
    Jul 29, 2011 9:24 AM (in response to Carolynjoy1228)

    Carolynjoy1228 wrote:


    It's a 15 inch aluminum, model number A1095.  I could tell you more information if I could turn it on.


    The test button gets one green LED flashing.


    It was making a whirring noise, then got hot, so I had to unplug it and take the battery out again.  Now it's cooled down, and I've got one flashing light.


    One flashing light means normally that the battery does not have enough charge to support operation for more than a minute or so.  That is what you would get when the machine sleeps itself or shuts itself down.


    So, the immediate problem is a discharged battery.  The root cause is a failure of charging, it would seem.  Can you get the machine to come up with the battery out and the power adapter attached?  I am suspecting no, but a totally tanked battery can hold off startup, even with the power adapter in.  What (if any) is the indicator color in the adapter plug at the computer when it is connected? 


    If there is no indication (green or amber) in the connected plug, then you either have a failed adapter or a failed DC-in/audio board.  Those boards (part number 922-6486) are around $50, give or take in the wild, and can be replaced with some work, though it is more involved than the DC-in board on a Titanium model.   The power adapter should be tested on another computer, as it is not reasonably possible to test the connector voltages with normal voltmeter leads.


    TiBook G4 1GHz/ G5 2 GHz DP GF Ultra 6800, Mac OS X (10.4.11)


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