Ibook G4 Shuts off After apple logo screen..HELP!!

Discussion in 'PowerPC Macs' started by MacNewbie85, Oct 24, 2011.

  1. MacNewbie85, Oct 24, 2011
    Last edited: Oct 24, 2011

    MacNewbie85 macrumors newbie

    Oct 24, 2011
    I have an used ibook G4. The problem that I have is that, during start up it gets to the grey screen with the apple logo, the little wheel turns at the bottom for a minute, then it shuts off. I don't have any cds or anything because i bought it second hand. but, I do have a external harddrive that I was using to backup my work and system from the time machine.

    I've tried:

    Resetting the PRAM
    Using the external Harddrive to boot

    I'm new to mac so please don't be too hard on me :)
  2. simsaladimbamba

    Nov 28, 2010
  3. max¥¥ macrumors 6502a

    Aug 7, 2008
    Over there....
    Do a pmu reset (search on the internet about how to do this, it is different between models)
    i had this problem with my iBook G3 and it solved it
  4. MacintoshMaster macrumors 6502


    Jan 16, 2010
    When you hear the chime hold down:

    alt command P R

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