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Fans odd idling and Wont wake from Sleep

715 Views 7 Replies Latest reply: Apr 29, 2011 3:29 PM by cosmichobo RSS
cosmichobo Level 3 Level 3 (515 points)
Currently Being Moderated
Apr 24, 2011 2:23 AM



Issue One:


A few weeks ago my Powermac 1.8Ghz dual G5 running 10.5.8 began having somewhat erratic sounding fans. Not flat out - they just sound like they can't quite reach a stable speed... every 5-10 seconds or so adjusting their speed.  No other noticed issues however, so didn't pursue it.


Issue Two:


After installing the latest updates (security and... Java?), my Mac wont wake fully from sleep.  The CPU wakes, fans resume normal (as per above) operation, and the light on the Apple Studio Display holds solid instead of dimming in/out, but there is no image (ie completely blank screen, no sign of any image), and the keyboard caps lock key does not illuminate...   (I am waking the computer by either clicking the mouse or hitting the space key on keyboard, so it does see them when it's asleep... just not when it tries to wake).


Only way out is to hold the power key and force shutdown...


Any ideas on either of these issues? 


Think I'm about ready to toss this supposed upgrade out and go back to the eMac...






PowerMac 2004 dual 1.8GHz, Mac OS X (10.5.8), 1.25GHz RAM, 2x 1TB WD Green Drives, Stock Vid Card
  • japamac Level 7 Level 7 (24,390 points)
    Currently Being Moderated
    Apr 24, 2011 7:05 AM (in response to cosmichobo)



    Have you run Disk Utility or Disk Warrior to repair the startup drive?

    That may be what is needed for either issue, but the Green drives may also be part of the wake from sleep issue.


    Try the hard drive directory repairs first.

    If you have a copy of the ASD, run thermal calibration for the fans.

  • japamac Level 7 Level 7 (24,390 points)
    Currently Being Moderated
    Apr 25, 2011 7:15 AM (in response to cosmichobo)

    I hate these "Unresolved kernel trap(cpu 0): 0x300 - Data access/frame not mapped or invalid:" reports.

    It's almost like saying, "Yep, you're sick"...... vague.


    Software is a possibility, so reinstall is a good idea.


    Hardware in the form of any cache or memory component is also suspect, so a one pass of zeros on the hard drive and a reseat and test of the RAM can also be in order.

    (Yikes this new forum format is confusing!)


    Worse than change for the sake of change is that it doesn't "just work".

  • japamac Level 7 Level 7 (24,390 points)
    Currently Being Moderated
    Apr 29, 2011 3:37 AM (in response to cosmichobo)

    Good news on finding the source.

    Keep an eye on it, as the RAM problem may be intermittent (marginal chip) and the issue may once again appear.


    Drive "maintenance" is pretty much required after RAM issues.


    Put a "sticky" up somewhere to test the RAM first should issues arise!

  • romko23 Level 2 Level 2 (395 points)
    Currently Being Moderated
    Apr 29, 2011 8:40 AM (in response to cosmichobo)

    Hi, sorry to interrupt.. Just because you change computer platforms you can STILL get kernel panics - the Intel Macs are not immune to kernal panic attacks either.. Just wanted to make that clear.


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