Anonymous 0924

Q: iMac G4 just turned off and won't turn back on

When I woke my iMac G4 from sleep, it turned on then all of a sudden turned off and shut down on me and won't turn back on. Any suggustions? It has Mac OS X 10.4.11 and before today worked perfectly.

iMac G4, Mac OS X (10.4.1)

Posted on Jan 11, 2013 6:45 PM

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Q: iMac G4 just turned off and won't turn back on

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  • by rccharles,

    rccharles rccharles Jan 12, 2013 11:30 AM in response to Anonymous 0924
    Level 6 (8,471 points)
    Classic Mac OS
    Jan 12, 2013 11:30 AM in response to Anonymous 0924

    1) Check power outlet.  Re-plug power cable.

     

    2) Rest pmu.  It is a small button on the logic board.

    http://support.apple.com/kb/HT1712

     

    3) Check poweron battery.  Replace if necessary.

     

    4) detach all devices.

     

    Robert

  • by SmeeSmee,

    SmeeSmee SmeeSmee Jan 28, 2013 6:09 AM in response to rccharles
    Level 1 (0 points)
    Jan 28, 2013 6:09 AM in response to rccharles

    Hi,

     

    I have the same problem and have done step 1 and 2.

    I am unclear about which battery I should check...I didn't realize imac g4s had a battery. Please clariy if possible~

  • by rccharles,

    rccharles rccharles Jan 28, 2013 11:01 AM in response to SmeeSmee
    Level 6 (8,471 points)
    Classic Mac OS
    Jan 28, 2013 11:01 AM in response to SmeeSmee

    Replacing the battery may or may not help.  It depends on the model of your mac.

     

    I am not familiar with intricacies of iMac G4.

    ______________________

    complete take apart guide.

    http://www.xlr8yourmac.com/systems/iMac_g4/iMacg4_takeapart.html

    You can see the battery in section 2.1

     

     

    http://www.satcure.co.uk/accs/imac2.htm

  • by ikwanzan,

    ikwanzan ikwanzan Sep 13, 2014 2:48 PM in response to rccharles
    Level 1 (0 points)
    Sep 13, 2014 2:48 PM in response to rccharles

    Check my post here regarding some funky business with the battery. Link is to post in the apple discussions forum.

  • by Orangekiss,

    Orangekiss Orangekiss Sep 26, 2014 5:37 PM in response to ikwanzan
    Level 1 (0 points)
    Sep 26, 2014 5:37 PM in response to ikwanzan

    You did try and turn it back on with the power switch on the side, right? Is everything else plugged into the same wall receptacle as you Mac working? If not check circuit breakers.

  • by ikwanzan,

    ikwanzan ikwanzan Sep 26, 2014 7:48 PM in response to Orangekiss
    Level 1 (0 points)
    Sep 26, 2014 7:48 PM in response to Orangekiss

    Your reply is confusing. Did you read my entire post, including link? If you had, you would find the statement, "After pressing the power on button."

     

    Further, your question, "You did try and turn it back on with the power switch on the side, right?", seems odd. I say this because I suspect my answer to that question would be obvious to 99% of the readers of this discussion. As far as I'm aware, there is no other way to turn on an iMac G4. Do you think that someone with the ability and knowledge to disassemble and reassemble (several times) an iMac G4, would not know they need to use the "power switch on the side", to turn it on?

     

    Also, if you had been reading this discussion carefully, I believe it would have been obvious that anyone who would venture into replacing the iMac G4 battery, would have first eliminated simple things like a bad outlet.

     

    Sorry for the tone here, but my guess it that 99% of the readers, get it.

  • by K Shaffer,

    K Shaffer K Shaffer Sep 27, 2014 5:12 PM in response to ikwanzan
    Level 6 (14,274 points)
    Desktops
    Sep 27, 2014 5:12 PM in response to ikwanzan

    Replies to such old threads are likely to be a bit curious.

    Mostly as to a reason why they are brought up, now.

     

    The link to XLR8 page shows an earlier iMac G4 model

    and that is slightly different than the last iMac G4 USB2.0

    (15"/17'/20") models. They tend to be more like this inside:

     

    •Mr Totes iMac G4 USB2.0 take apart:

    http://www.mrtotes.co.uk/page1/page1.html

     

    Thermal paste and other steps are required with access

    into these layers where the 3.6V 1/2AA lithium battery,

    and factory RAM slot, HDD, optical drive, etc, are located.

     

    •3.6V Lithium 1/2AA PRAM clock battery, example:

    http://eshop.macsales.com/item/NewerTech/BAA36VPRAM/

     

    Also, the 17"/20" can use 2048MB RAM when both slots

    get upgraded to 1024MB each, respective to type in each.

    The bottom slot uses the same SODIMM as the last iBook

    G4 (mid-2005) does, as an upgrade, exact in specification.

     

    The power supply can be tested via small ports in the bottom

    under metal plate (by reset button, by airport card slot) to

    see if the power supply has failed in one of its voltages.

     

    Anyway, curious to see an old thread come up like this.

     

    In any event...

    Good luck & happy computing!