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PowerBook G4 12" won't boot

677 Views 14 Replies Latest reply: Jan 15, 2013 10:01 AM by John Galt RSS
adison132 Calculating status...
Currently Being Moderated
Jan 15, 2013 3:40 AM

Hello,

My powerbook cant boot. It freezes on fizzy apple logo.

(safe mode isn't working too). It looks like this:

20130115_120632.jpg

Also it wont boot from install cd or

hardware test cd:

20130115_121243.jpg

I tryed everything to fix it.

-reseted pram/nvram

-removed airport

-reseted pmu

-used fsck in single user

 

I hope that is only a software problem.

PowerBook, Mac OS X (10.4.6), PowerBook G4 12"
  • BGreg Level 6 Level 6 (17,500 points)
    Currently Being Moderated
    Jan 15, 2013 5:12 AM (in response to adison132)

    See his Apple note on solving problems with booting. Can you hook it up in target disk mode via Firewire to another mac to run a disk repair? 

  • Knucklesmac Level 4 Level 4 (2,225 points)
    Currently Being Moderated
    Jan 15, 2013 7:30 AM (in response to adison132)

    Hello,

    Have you tried booting from the System Restore Disk supplied with the PowerBook? Or a Mac OS X disk?

  • BGreg Level 6 Level 6 (17,500 points)
    Currently Being Moderated
    Jan 15, 2013 8:22 AM (in response to adison132)

    Do you have an external firewire CD reader you can hook up? I'd sure like to run the Apple Hardware Test.  How about a bootable backup? If you have one, can you boot holding the alt/option key down when the bootable backup is attached via firewire?

  • John Galt Level 7 Level 7 (33,010 points)
    Currently Being Moderated
    Jan 15, 2013 8:40 AM (in response to adison132)

    I realize you cannot boot from any Mac OS X disc, but please try booting from your Apple Hardware Test CD / DVD, or whatever disc that shipped with your PowerBook that has the words "Apple Hardware Test" or "AHT version xxx" printed on it.

     

    To do this, start your PowerBook and insert the disc as soon as the drive's mechanism accepts it, then hold an Option key to invoke Startup Manager:

     

    Startup_Manager.jpg

     

    Using the cursor (arrow) keys, select the optical disc and press Return to boot from it.

     

    Does this work at all?

     

    If not, the next suggestion is to boot in Verbose Mode: hold ⌘ v while starting your Mac. The point beyond which it cannot progress will be shown as text. Transcribe it or attach a readable photo in a reply.

     

    Try removing and replacing your RAM if that is an option for you.

     

    This looks like a hardware problem for which a repair may not be economically justifiable. The contents of your hard disk may be retrievable using FireWire Target Disk Mode or by its physical removal and installation in an external drive enclosure.

     

    To eject the optical disc restart your PowerBook while keeping the trackpad button depressed.

    MacBooks  iMacs  iPads  AirPorts, OS X Mountain Lion,  28 years Apple!
  • Knucklesmac Level 4 Level 4 (2,225 points)
    Currently Being Moderated
    Jan 15, 2013 9:22 AM (in response to adison132)

    That last image would indicate some fault with the monitor or the graphics controller.

    This could indicate a hardware failure very similar to that I've seen on G4 12" iBook models.

  • John Galt Level 7 Level 7 (33,010 points)
    Currently Being Moderated
    Jan 15, 2013 9:34 AM (in response to adison132)

    Everything looks OK right up to the moment the GPU fails.

     

     

    AHT requires a minimum amount of operable hardware to run. You indicated earlier that AHT said "invalid memory access" or words to that effect. No further diagnosis will be possible.

  • John Galt Level 7 Level 7 (33,010 points)
    Currently Being Moderated
    Jan 15, 2013 10:01 AM (in response to adison132)

    A corrupted display tells you everything you need to know. It only confirms what you already observed in your original post.

     

    If you are so inclined you could shop for a replacement logic board from a reputable parts dealer. PowerBook Medic and iFixit come to mind. The supply is limited but prices are quite reasonable, and it will be guranteed. Be sure to specify the exact model required. Disassembly, removal, and replacement are tedious chores for the technically adept only.

     

    You could try eBay, as long as the board is guaranteed.

     

    Buyers on eBay essentially have the last word on returns these days. Sellers have no choice but to accept returns, as long as it is within the allotted time.

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