1 2 Previous Next 18 Replies Latest reply: Jun 11, 2012 8:50 PM by KGD
KGD Level 2 Level 2 (495 points)

Out of nowhere, my 1.25 DP G4, running smooth as glass up until now, has out of nowhere screen freezes.  Any suggestions to fix?


PowerMac
  • 1. Re: Sick Windtunnel G4 - Freezes and Panics
    BDAqua Level 10 Level 10 (116,465 points)

    Have you blown the dust out layely?

     

    Does it do better if allowed to cool?

     

    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 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


  • 2. Re: Sick Windtunnel G4 - Freezes and Panics
    KGD Level 2 Level 2 (495 points)

    Replaced video card, and thought problem was solved.  Kernel panics re-appeared and unable to boot in Safe Mode or standard mode many times.  Panics after sleep.  Will try to re-boot and check System Prefs.  Thanks, BBDAqua.  Will update as I know (have rejuvenated iBook on hand).

  • 3. Re: Sick Windtunnel G4 - Freezes and Panics
    japamac Level 7 Level 7 (24,390 points)

    Do you have the AHT disc?

    If not, download and burn AHT v1.2.6 to CD and test your machine:

    http://www.info.apple.com/support/aht.html

     

    Test memory with Rember or Memtest X.

     

    No PCI cards or such installed, right?

    If so, remove for troubleshooting purposes.

     

    Have a second hard drive or spare volume? Clean install OS X and see how it runs.

    KPs and freezes aren't always hardware.....

  • 4. Re: Sick Windtunnel G4 - Freezes and Panics
    KGD Level 2 Level 2 (495 points)

    I can't get it to show the initial screen with the Apple on it; only does so intermittently.  If IU manage to get to the Desktp, she freezes.  When I attempt to boot OSX from the install DVD, no screen, no response or display; but will keep trying.  Could this machine be dead?

  • 5. Re: Sick Windtunnel G4 - Freezes and Panics
    japamac Level 7 Level 7 (24,390 points)

    Doesn't sound prommising, but anything from a failed hard drive to a failed CPU could be the issue.

     

    Will the machine start up in Open Firmware? If it will, you can check the status of some of your hardware.

    Please read, learn and apply the following:

     

    http://osxbook.com/book/bonus/ancient/whatismacosx/arch_boot.html

     

    Of particular interest are in examples 2 and 3 for checking the RAM report and the CPU report.

  • 6. Re: Sick Windtunnel G4 - Freezes and Panics
    KGD Level 2 Level 2 (495 points)

    Thanks, Japamac.  I will look into this as soon as I can.  I was able to reinstall the OS on another of the 4 hard drives and still getting freezes here and there, particularly after a sleep and when there are more than 4 hard drives in the machine.  It was a real push though to where it is now.... freezes galore prior to this new OS instillation.

  • 7. Re: Sick Windtunnel G4 - Freezes and Panics
    japamac Level 7 Level 7 (24,390 points)

    I was able to reinstall the OS

    Good. Progress is good...

     

    Since it's booting, Open Firmware boot is likely unnecessary (for now).

     

    Check the System Profiler/Hardware for proper reports of memory and CPU.

    Check the Diagnostics report.

     

    Open Console and look for logs relating to failed processes after sleep wake event.

     

    Pull all but the current boot drive. Lets limit possible suspects.

     

    Pull all PCI cards (if any).

     

    Since it's running, download Memtest X or Rember and test your RAM.

    Testing all RAM in Single User mode (use Memtest) is best.

    I'd test regardless of the system report.

     

    If the RAM test is clean, then we have eliminated another big possibility.

  • 8. Re: Sick Windtunnel G4 - Freezes and Panics
    KGD Level 2 Level 2 (495 points)

    Japamac,

     

    Came in tonight and the Mac is not booting with the exception of one time.  Would a replacement 1/2 AA help?  Spent most of yesterday on this and now back @ the beginning. 

     

    Have a spare G5, maybe I should set that up and scrap thiis one.

  • 9. Re: Sick Windtunnel G4 - Freezes and Panics
    japamac Level 7 Level 7 (24,390 points)

    Would a replacement 1/2 AA help?

    I always replace batteries in stubborn machines.

    Help, or not, it removes doubt.

  • 10. Re: Sick Windtunnel G4 - Freezes and Panics
    KGD Level 2 Level 2 (495 points)

    considering that.

  • 11. Re: Sick Windtunnel G4 - Freezes and Panics
    japamac Level 7 Level 7 (24,390 points)

    Did you pull out all the extra drives?

    Reseat the RAM?

  • 12. Re: Sick Windtunnel G4 - Freezes and Panics
    KGD Level 2 Level 2 (495 points)

    I did that the other day; will try again.  In the meantime, I ordered a 1/2 AA and waiting for it to arrive.  Will update once I know more.

  • 13. Re: Sick Windtunnel G4 - Freezes and Panics
    KGD Level 2 Level 2 (495 points)

    Pulled out drives, reseated RAM, replaced battery.  Still getting black screen (with occasional screen that will show, then freeze or panic) and sometimes no chime w/fans kicking up..... any more thoughts or a funeral with full honors?

  • 14. Re: Sick Windtunnel G4 - Freezes and Panics
    BDAqua Level 10 Level 10 (116,465 points)

    I'd consider replacing the Thermal Paste between the CPUs & Heatsink, it could have lost it's properties.

     

    jmac can recommend the best one & way to do it.

     

    Does it take a bit longer to panic if it's cooled?

1 2 Previous Next