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  • tmeritan Level 1 Level 1

    Apple change my computer

  • LifeReceiver Level 1 Level 1

    This problem was resolved by the EFI update, but now I've got a new problem.  I upgraded to Mountain Lion and am now getting the NVDA(OpenGL): Channel exception kernel panic.  I wonder if this is related to the EFI update and an incompatibility with Mountain Lion.  Has anybody else started experiencing this issue after upgrading to Mountain Lion?

  • CT Level 6 Level 6
    expertise.notebooks
    Notebooks

    No such problem on my late 2008 machine.

  • basilmir Level 1 Level 1

    Yes. My late 2008 seems to have fixed itself under mountain lion. No issues so far.

  • TBigfield Level 1 Level 1

    My late 2008 MBP's screen flickers slighty, but notably, every few seconds with either the 9400m and the 9600gt enabled.

    I'm on Mountain Lion 10.8.2 and this started happening a few days ago..

    From this thread and elsewhere on the internet, this shouldn't be happing since it should be a software related issue.

     

    Anyone else experiencing this under ML?

    also, since the mbp is from februari 2009 i've got no more applecare; this means i'm f'ed either way right?

  • basilmir Level 1 Level 1

    Reinstall Mountain lion from scratch install all updates and firmwares via Software Update... use gfxCardstatus (google) to switch cards... test it a while.

     

    If problem persists... hardware issue... (heat has caused the nvidia chip to unsolder itself from the mainboard) no fix unless you take it to a prof reballing shop.

  • TBigfield Level 1 Level 1

    thanks for the quick reply,

    as it would happen my SSD failed a few days ago so installed new hard drive and Lion then update to ML and updated that too.

    I use gfxcardstatus aswell. you think i should reinstall from ML not from Lion?

  • basilmir Level 1 Level 1

    http://support.apple.com/kb/DL1502

     

    Did you install this?

  • TBigfield Level 1 Level 1

    i've just tried installing it but i'm not allowed to,

    is there a way to check wether it's installed?

  • basilmir Level 1 Level 1

    Click the apple logo in the top left... then About this mac... then more information... then system report...

     

    In this screen there should be SMC version: 1.41.f2

     

    What does yours say?

  • TBigfield Level 1 Level 1

    it says 1.41f2

    probably a hardware failure then?

  • basilmir Level 1 Level 1

    99% sure it's a hardware problem...

    Check this out:

     

    http://www.ifixit.com/Answers/View/9045/MBP+A1226+Logic+Board+last+resort+fix+fo r+nVidia+video+chip

     

    You should have a prof repair shop look at it... not the apple "genius" type but laptop repair shops...

     

    Both chips need resoldering... it will take a day to do it... I'm from eastern europe, we have this HUGE technical student campus here... they can fix anything... about three big shops... costs less than 50$ to do.

     

    (took a hdd to them once... the electronics were fried, they kept it for 8 months to find a close serial number match while searching through all the junk they had on hand... rewired it... it's been working for a year now... recoverd all the data too)

     

    Make sure they know what they are doing, parts cost less than 5$ to fix quality reflux and stuff plus some resin... the rest is up to a magical set of hands and the right equipment.

  • TBigfield Level 1 Level 1

    thanks alot for answering my questions,

    it seems to only happen when my harddrive is writing and thus spiking power.

    With my SSD this did not happen...

    I will get it looked at asap before it's too late.

     

    ----edit----

    also, external screen (1920*1080) works fine (mirror or screen extension), kinda weird the mbp screen flickers and the big screen doesnt.

    all pointing toward power issue's..

  • basilmir Level 1 Level 1

    I don't think they are related.

     

    You mean it never displayed this problem while using ssd?

     

    Normally does it happen while on battery or AC or both?!

  • TBigfield Level 1 Level 1

    OMG, i've found the solution to my problem...

    it was the AC which was malfunctioning. Switching the AC adapter made the flickering go away..

     

    Thanks alot for thinking with me, now I can sleep well tonight!