HT1767: iMac G5: How to Reset the SMU

Learn about iMac G5: How to Reset the SMU
Authapol
Level 1 (0 points)

Q: My iMac would not reboot following a forced quit. Any suggestions

Hello, my iMac would not reboot following a forced quit the previous evening.  I had to forced quit because the security pane in the system preference did not respond to command to quit. Prior to that I installed Carbon Copy to back up some personal data to hard disc and while doing that I accidentally hit the security button.  Any comments or suggestions, please.

iMac, Mac OS X (10.6.2)

Posted on Jul 26, 2012 4:41 PM

Close
Authapol

Q: My iMac would not reboot following a forced quit. Any suggestions

  • All replies
  • Helpful answers

  • by RRFS,

    RRFS RRFS Jul 26, 2012 5:48 PM in response to Authapol
    Level 5 (4,490 points)
    Jul 26, 2012 5:48 PM in response to Authapol

    SMC RESET

    http://support.apple.com/kb/HT3964

     

    • Shut down the computer.
    • Unplug the computer's power cord and ALL peripherals.
    • Wait 15 seconds.
    • Attach the computers power cable.
    • Wait another 5 seconds and press the power button to turn on the computer.

     

    • The 5 second timing is important to a successful reset.

     

     

     

    PRAM RESET

    Zap the PRAM

     

    • Shut down the computer.
    • Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
    • Turn on the computer.
    • Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
    • Hold the keys down until the computer restarts and you hear the startup sound for the second time.
    • Release the keys.

     

     

    If you are still running 10.6.6 I would recommend updating to 10.6.8

    Mac OS X 10.6.8 Update Combo v1.1


  • by Authapol,

    Authapol Authapol Jul 27, 2012 4:48 AM in response to RRFS
    Level 1 (0 points)
    Jul 27, 2012 4:48 AM in response to RRFS

    Thank you very much for your response. I have tried both resets, but problem remains.

    Any further suggestions, please.

     

    Authapol

  • by RRFS,

    RRFS RRFS Jul 27, 2012 6:56 AM in response to Authapol
    Level 5 (4,490 points)
    Jul 27, 2012 6:56 AM in response to Authapol

    Are you getting ANY indications when you push the power button? Are all your power cords properly plugged and is the circuit you are in live?

  • by Authapol,

    Authapol Authapol Jul 28, 2012 11:43 AM in response to RRFS
    Level 1 (0 points)
    Jul 28, 2012 11:43 AM in response to RRFS

    Hi,

    Thank you very much. Yes the power is on and there was a chime before Apple logo appears. Seconds later grey spinning wheel appears and continue to spin.  Nothing else follows.

     

    Authapol