Question about Apple iMac G5 Desktop

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My iMac G5 1.8 GHz 2GB ram computer desktop

My iMac G5 1.8 GHz , OS X 10.5.7, 2GB ram computer desktop display scrambles with a herringbone pattern and locks up entire computer. The computer runs fine in Safe Mode, but not in normal mode.
I ran the computer 48 hours solid in Safe Mode and it performed flawlessly.
I was able to run my email program, all of my Microsoft Office programs, use my shared printer, etc without difficulty
I realize resources are limited in safe mode and the problem could be a process or something else that is loaded while in normal mode.
I ran the TechTool Deluxe diagnostics from Apple Care and everything passes.
I have reset the SMU and PRAM. nothing seems to work.
Any suggestions?


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  • 221 Answers

Hello
If you can run it in safe mode, that means that you have an extension problem. I had most of the time problems with the ATI extensions.
First of all try too boot on another account, an new one would be good, to check if this is not account related.
Secondly i would reinstall the system (a clean install would be good, tough you can try an archive-install)
Thirdly if it isnt fixed I would delete all ATI extensions instead of the one that your graphic card uses. to delete: go to /System/Library/Extensions . 
Hope that helps

Posted on Aug 06, 2009

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Posted on Jan 02, 2017

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