kernal panic/black box----invalid memory access

Posted on 2009-02-15
Last Modified: 2012-05-06
My ibook g4 1.33GHz has issues with start/restart.  Reinstalled Tiger. Yet it continues to "crash' to black box-- which says I need to restart computer.  If I shutdown and leave the computer alone for sometime, it will reboot into OS X and it's usually good until you ask for restart. The screen stays black with no reboot.  I shut G4 down and restart into Open Firmware with message--invalid memory access. At this point, if I type in mac-boot, a folder with question mark shows up.. If I type shutdown, it shuts off fine. Upon reboot the screen is black or if I attempt to reset pram, it goes to Open Firmware with IMA message. If I try to reboot with Install CD, it goes to Open Firmware. It I set the G4 aside for an hour or so, it usually reboots fine but, if I tell it to restart, it either goes black or ends up with Open Firmware.  When the G4 is running in OS X it functions fine.
Question by:robbiten
    LVL 53

    Expert Comment

    Here is a pretty comprehensive guide to dealing with kernel panics:

    Try starting in safe mode by holding down the shift key. Then open Disk Utility and see what the SMART drive status of your drive is. Then run Verify Disk to see if you have any disk directory corruption.

    Have you added third party RAM lately?

    Author Comment

    THANKS.......unable to access Disk Utility to check SMART status.  No third party ram in place--it was removed.  About ready to tear her down.  Considering removing the airport card attached to MB and check the video chip pins 1 & 28 for looseness.  Other than that, it could be time for a another logic board. Any further thoughts would be greatly appreciated.  Rob

    Accepted Solution

    Question PAQ'd, 500 points refunded, and stored in the solution database.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    6 Surprising Benefits of Threat Intelligence

    All sorts of threat intelligence is available on the web. Intelligence you can learn from, and use to anticipate and prepare for future attacks.

    Suggested Solutions

    In this article we will discuss some EI Capitan Mail app issues and provide some manual process to resolve them.
    In this article we have discussed about the OS X EI Capitan and how to fix Wi-Fi issue in OS X El Capitan. We have explained how to delete system level preferences and create a new Wi-Fi location to resolve Wi-Fi issue.
    Need more eyes on your posted question? Go ahead and follow the quick steps in this video to learn how to Request Attention to your question. *Log into your Experts Exchange account *Find the question you want to Request Attention for *Go to the e…
    Here's a very brief overview of the methods PRTG Network Monitor ( offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

    759 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    14 Experts available now in Live!

    Get 1:1 Help Now