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MacBook Pro screen blinks

353738 Views 1,620 Replies Latest reply: Mar 18, 2014 11:48 PM by accessd RSS Branched to a new discussion.
  • tmeritan Level 1 Level 1 (20 points)
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    Aug 13, 2012 4:18 PM (in response to tmeritan)

    Apple change my computer

  • LifeReceiver Level 1 Level 1 (15 points)
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    Oct 11, 2012 8:50 AM (in response to tmeritan)

    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 (14,960 points)
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    Oct 11, 2012 9:32 AM (in response to LifeReceiver)

    No such problem on my late 2008 machine.

  • basilmir Level 1 Level 1 (65 points)
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    Nov 7, 2012 12:59 PM (in response to LifeReceiver)

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

  • TBigfield Calculating status...
    Currently Being Moderated
    Nov 27, 2012 2:47 PM (in response to munchnstuf)

    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 (65 points)
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    Nov 27, 2012 2:48 PM (in response to TBigfield)

    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 (0 points)
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    Nov 27, 2012 2:51 PM (in response to basilmir)

    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 (65 points)
    Currently Being Moderated
    Nov 27, 2012 2:55 PM (in response to TBigfield)

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

     

    Did you install this?

  • TBigfield Level 1 Level 1 (0 points)
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    Nov 27, 2012 2:57 PM (in response to basilmir)

    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 (65 points)
    Currently Being Moderated
    Nov 27, 2012 3:00 PM (in response to TBigfield)

    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 (0 points)
    Currently Being Moderated
    Nov 27, 2012 3:00 PM (in response to basilmir)

    it says 1.41f2

    probably a hardware failure then?

  • basilmir Level 1 Level 1 (65 points)
    Currently Being Moderated
    Nov 27, 2012 3:11 PM (in response to TBigfield)

    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 (0 points)
    Currently Being Moderated
    Nov 27, 2012 3:51 PM (in response to basilmir)

    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 (65 points)
    Currently Being Moderated
    Nov 27, 2012 3:54 PM (in response to TBigfield)

    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 (0 points)
    Currently Being Moderated
    Nov 27, 2012 3:57 PM (in response to basilmir)

    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!

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