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

Posted on 2009-02-15
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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.
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Question by:robbiten
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by:strung
ID: 23646391
Here is a pretty comprehensive guide to dealing with kernel panics:  http://www.thexlab.com/faqs/kernelpanics.html

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?
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by:robbiten
ID: 23646819
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
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