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Thread: Mac G4 not starting up!

  1. #1

    Member Since
    Jun 11, 2009
    Your Mac's Specs
    3.2 GHz Quad-Core Intel Xeon, OS 10.8.5
    Angry Mac G4 not starting up!
    I went on a short vacation and so I unplugged all my computers, the modem, and the phone line to the modem.

    My backup computer is a G4 Mirrored Door Drive. I've never had any issues with it. But when I came back this time it won't start up: It gives a 2-second "whirrrrr....." and then nothing.

    I fear the worst, but any thoughts?

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, High Sierra
    I'm not familiar enough with that old a machine, but it does sound like your G4 power supply may have decided to die. Some of our members are much more versed on Mac dinosaurs than I am, so hang on for more answers.

  3. #3

    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Brentwood Bay, BC, Canada
    I fear the worst, but any thoughts?
    Leave it plugged into a powered receptacle overnight and try again.

    It may give the PRAM battery enough of a charge to allow it to startup.

    If that doesn't work, replace the PRAM battery,

    I'm sure it will be a 3,6v 1/2AA battery that most normal computer shops should carry and $10.00 or less.

    I still have the last 1.25Ghz MMD dual-boot model sitting under my wife's desk but unused. Its PRAM battery will also no doubt be kaput!!

    Good luck.

    Here's a video as to how to replace ie:

    Maybe Jony Ive could take note that the access door just swings down and the PRAM battery and all the rest of the innards are right there. They way all Macs should still work with maybe some variations!!!


    - Patrick
    Last edited by pm-r; 05-15-2018 at 08:24 PM.

  4. #4

    Member Since
    Jun 11, 2009
    Your Mac's Specs
    3.2 GHz Quad-Core Intel Xeon, OS 10.8.5
    Replaced the PRAM battery with a new one. No difference. The "on" button lights up for a fraction of a second, then it goes out.

  5. #5

    ferrarr's Avatar
    Member Since
    May 21, 2012
    Pawtucket, RI, USA
    Your Mac's Specs
    L2014 Mac mini macOS 10.13, iPhone 8+ iOS 11, 12.9" iPad Pro 1 iOS 11,  Pencil 1
    Do you have a way to test the power supply? Have you checked both ends of the power cord, to confirm good connection? Have you opened it up, and see if it needs a good cleaning?
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

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