HT1939: Resetting PMU on Power Mac G5, Power Mac G4, Power Macintosh G3

Learn about Resetting PMU on Power Mac G5, Power Mac G4, Power Macintosh G3
mkanyemba
Level 1 (0 points)

Q: how come my apple power mac g5 turns its self off when i try opening a page

can you help my apple power mac g5 desktop is truning its self off when ever i try openning a page.or going online.it had recently been updated with os x 10.5.8

PowerMac, Mac OS X (10.5.8)

Posted on Dec 30, 2012 12:44 PM

Close
mkanyemba

Q: how come my apple power mac g5 turns its self off when i try opening a page

  • All replies
  • Helpful answers

  • by BDAqua,

    BDAqua BDAqua Dec 30, 2012 2:10 PM in response to mkanyemba
    Level 10 (123,506 points)
    Dec 30, 2012 2:10 PM in response to mkanyemba

    Hello,

     

    One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...

     

    PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive

     

    Reboot, test again.

     

    If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.

     

    Check the System Preferences>Other Row, for 3rd party Pref Panes.

     

    Also look in these if they exist, some are invisible...

     

    /private/var/run/StartupItems

    /Library/StartupItems

    /System/Library/StartupItems

    /System/Library/LaunchDaemons

    /Library/LaunchDaemons

  • by Jacumba,

    Jacumba Jacumba Dec 31, 2012 1:07 PM in response to mkanyemba
    Level 4 (2,349 points)
    Dec 31, 2012 1:07 PM in response to mkanyemba

    Also where the symptom occurs when opening a page online, particularly with graphics and video, that is when the cpu will spike to full power. So check for the cpu overheating, and shutting down the computer, possibly due to dust build up or a fan not working...

  • by Jacumba,

    Jacumba Jacumba Dec 31, 2012 7:04 PM in response to Jacumba
    Level 4 (2,349 points)
    Dec 31, 2012 7:04 PM in response to Jacumba

    If it only does it in Regular Boot, then it could be some hardware problem like Video card,

     

    A video card failure would not cause a computer to shut down, the wrong video card driver can cause continual re-starts on its own. 

     

    <Edited by Host>

  • by BDAqua,

    BDAqua BDAqua Dec 31, 2012 7:42 PM in response to Jacumba
    Level 10 (123,506 points)
    Dec 31, 2012 7:42 PM in response to Jacumba

    Who sad failure besides you???