10 Replies Latest reply: May 1, 2012 4:18 AM by Triumph Tech
Triumph Tech Level 1 Level 1 (0 points)

Hi There,

 

I have a strange issue on my Mac, it s running OS X 10.6 with all software updates completed. Last week I started getting odd display issue as attached. I have foudn an updated drive for the NVIDEo card and put this on but no difference. Any further ideas?

 

Screen shot 2012-04-14 at 09.26.13.png

Screen shot 2012-04-14 at 09.26.40.png

 

Thanks

 

Dave


Mac OS X (10.6)
  • 1. Re: OS X 10.6 Display Issues
    a brody Level 9 Level 9 (63,285 points)

    Run the hardware test that came with your Mac:

    http://support.apple.com/kb/HT1509

    If unrevealing, it is possible either the program you are using doesn't have direct support for your graphics chip, or the image file itself is corrupted, and you should see if transferring it elsewhere reveals the same issue.  If you save your  image as PNG, try attaching it to the communities post, and we can see on alternative hardware if the image is corrupt. Cause from the looks of it, you only attached a screen capture, which is not really the image file itself.

    Note: JPEG is a lossy compression format.  When you save it as more compressed than the original, any image corruption will be magnified by the compression.

  • 2. Re: OS X 10.6 Display Issues
    Triumph Tech Level 1 Level 1 (0 points)

    Hi There,

     

    Thanks for the quick responce, much aprreciated. I should say that this sort of effect can happen in any program. Even if I just boot up the machine and click on the apple logo at top loeft the menu that appears can have the stripes. I will run hardware test though, does what I have said give any more ideas?

     

    Thanks


    Dave

  • 3. Re: OS X 10.6 Display Issues
    a brody Level 9 Level 9 (63,285 points)

    So you are saying any program, including when you aren't loading an image file?  This really sounds more and more like either a GPU, inverter, or a system wide issue with the software installed.  The hardware test will at least identify if the GPU is at fault.

  • 4. Re: OS X 10.6 Display Issues
    Triumph Tech Level 1 Level 1 (0 points)

    Ok thankyou I will run the hardware test and see what happens

  • 5. Re: OS X 10.6 Display Issues
    Triumph Tech Level 1 Level 1 (0 points)

    Hi There,

     

    I have run a hardware test and thsi came back ok. Tried booting in safe mode and the problem goes away. Is there someway of disabling the startup items one by one so I can see what is the cause?

     

    Thanks


    Dave

  • 6. Re: OS X 10.6 Display Issues
    a brody Level 9 Level 9 (63,285 points)

    Well you may be infected with the Flashback malware.  Unless you are certain any software is not compatible with 10.6.8, you should upgrade to it, by first backing up your data:

    https://discussions.apple.com/docs/DOC-1992

    And the applying the necessary patches for 10.6.8

    https://discussions.apple.com/docs/DOC-3261

    Disabling Java will prevent its continued infection as well, however, if this issue should happen on a boot where you haven't run a web browser, then you may have to remove all Quicktime plugins and reinstall the latest Quicktime for 10.6.

    http://support.apple.com/kb/HT3678

    And if it still fails to fix things, you may be forced to erase and install 10.6, install 10.6.8 combo, install the Flashback Java patch, and lastly install your applications and copy over your documents.  Some third party driver you aren't aware of may be problematic.  You'll need to troubleshoot it one by one with a reboot after each install to discover the culprit.

  • 7. Re: OS X 10.6 Display Issues
    Triumph Tech Level 1 Level 1 (0 points)

    Ok thanks again for the quick reply.  I will do all updates and try disabling Java. When you say upgrade to 10.6.8 I have done all software updates already, would this have come down with these?

     

    Thanks

     

    D

  • 8. Re: OS X 10.6 Display Issues
    Triumph Tech Level 1 Level 1 (0 points)

    Just thought I would update on how this is going. I have tried all of Brody's suggestions (except rebuilding the OS) and no luck. We did try reubiling but couldn't boot of any CD's. Took it to the Mac store and they say it is a hardware fault despite the tests coming back ok. I will post the final fix. Can anyone recommend a more comprehensive mac hardware test?

     

    Thanks

     

    D

  • 9. Re: OS X 10.6 Display Issues
    a brody Level 9 Level 9 (63,285 points)

    Techtool Pro is fairly thorough, though Apple stores still have the creme de la creme of tools which I haven't seen anyone have except some people at http://www.apple.com/usergroups/

  • 10. Re: OS X 10.6 Display Issues
    Triumph Tech Level 1 Level 1 (0 points)

    Hi All,

     

    Just to let everyone know for future, Apple replaced the logic board and this fixed the issue. No rebuild nessesary which I was pleased about!

     

    Thanks for all the help.


    Dave