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New iMac 27inch screen flickering/tearing/shutoff

453234 Views 4,486 Replies Latest reply: Feb 9, 2010 6:59 AM by Brett L RSS
  • Rudy Norff Calculating status...
    Currently Being Moderated
    Dec 24, 2009 3:10 AM (in response to ggia)
    ggia wrote:
    Guys

    Apple did an upgrade of the graphics/Display of the ATI Radeon HD 4850 to fix the screen flickering problem of the iMac 27" screen.

    I installed it right now, let's see if this corrects the problem.

    Merry Christmas



    Yes and it does not work for most as a lot of members have already written in the posts before.

    Gabriele Gianolli
    MB Pro 15" 2.2GHz, 4GB RAM, Mac OS X (10.6.2)
  • atlatnesiti Level 1 Level 1 (5 points)
    Currently Being Moderated
    Dec 24, 2009 3:29 AM (in response to ggia)
    i7 - week 47, delivered on November 23 2009 - NO issues...
    Applied graphics firmware update version 1 and NO issues.
    BTW;
    1. I have "sleep" disabled
    2. Spotlight - disabled
    3. Time Machine - disabled
    4. Widgets - disabled
    5. Automatic Updates - disabled
    Basically all the "crap" is disabled...
  • Carlo B. Calculating status...
    ok, my replacement started to flicker and go black right now. I've had this machine (the second) for less than 24 hours and I still have the first one, waiting for TNT to pick it up. Should I ask for a third replacement or just get a refund?
    iMac 27" i7, Mac OS X (10.6.2)
  • walker3333 Calculating status...
    Currently Being Moderated
    Dec 24, 2009 4:55 AM (in response to Carlo B.)
    Hello Carlo,
    what week is the replacement? Did it come with new ATI firmware installed?
    MacBook Pro 15", still waiting my iMac 27" i7 8GB 1TB, ordered 26th of October, Mac OS X (10.6.2)
  • Carlo B. Level 1 Level 1 (0 points)
    Currently Being Moderated
    Dec 24, 2009 4:58 AM (in response to walker3333)
    It's a week 50 (my first one was a week 45). It did not come with the firmware update installed, I installed it first thing after unboxing.
    iMac 27" i7, Mac OS X (10.6.2)
  • hkrause Level 1 Level 1 (0 points)
    Currently Being Moderated
    Dec 24, 2009 5:16 AM (in response to Carlo B.)
    How can you tell if the firmware upgrade has already been installed on a newly unwrapped machine?
    macbook pro, Mac OS X (10.6.2)
  • Carlo B. Level 1 Level 1 (0 points)
    Currently Being Moderated
    Dec 24, 2009 5:17 AM (in response to hkrause)
    it shows up if you run Software Update.
    iMac 27" i7, Mac OS X (10.6.2)
  • walker3333 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Dec 24, 2009 5:25 AM (in response to Carlo B.)
    or you can check the system profiler, locate the ROM Revision field. You should see revision 113-B9110C-425 or 113-B8030F-260 if the update has been applied.
    MacBook Pro 15", still waiting my iMac 27" i7 8GB 1TB, ordered 26th of October, Mac OS X (10.6.2)
  • hkrause Level 1 Level 1 (0 points)
    Currently Being Moderated
    Dec 24, 2009 5:29 AM (in response to walker3333)
    Thanks...just checked, got this:

    ATI Radeon HD 4850:

    Chipset Model: ATI Radeon HD 4850
    Type: GPU
    Bus: PCIe
    PCIe Lane Width: x16
    VRAM (Total): 512 MB
    Vendor: ATI (0x1002)
    Device ID: 0x944a
    Revision ID: 0x0000
    ROM Revision: 113-B9110C-425
    EFI Driver Version: 01.00.383
    Displays:
    iMac:
    Resolution: 2560 x 1440
    Pixel Depth: 32-Bit Color (ARGB8888)
    Main Display: Yes
    Mirror: Off
    Online: Yes
    Built-In: Yes
    Connection Type: DisplayPort
    Display Connector:
    Status: No Display Connected

    So, the rom upgrade came pre-installed.

    Thanks for the tip.
    macbook pro, Mac OS X (10.6.2)
  • spyke11 Calculating status...
    Currently Being Moderated
    Dec 24, 2009 5:34 AM (in response to walker3333)
    Hello,
    My imac is up to date with the lastest gpu update since 2 hours and no flickering and blank screens problems is detected..... I've launched a program who take many ressources (the rear top is very hot )...... wait and see....
    Imac 27", Mac OS X (10.6.2), Dual Boot Windows 7
  • hoffmake Calculating status...
    I have had absolutely no problems with my preordered 27 inch i7 IMac. I received it two weeks after it was announced and it has worked flawlessly. The recent fix was downloaded and installed. It has made no difference in operation. Could the problem be hardware related?
    27" iMac i7, Mac OS X (10.6.2)
  • James Coley Level 2 Level 2 (385 points)
    Currently Being Moderated
    Dec 24, 2009 8:43 AM (in response to mert)
    I am getting flickering only when running Parallels 5 with Windows 7. I never get it in native OS x. I am assuming this is a software issue with Parallels--any one else having similar problem?
    PB 17 1.33 Ghz, PB 12 1Ghz, Quad, iMac 20" 2.0 Ghz Duo, MBP 15 2.4 Ghz Duo, Mac OS X (10.6.2)
  • Sonics99 Calculating status...
    Currently Being Moderated
    Dec 24, 2009 9:04 AM (in response to spyke11)
    Just for reference, it has nothing to do with heat or intensive programs like so many people on here have suggested. For most people they notice it when the machine is just warming up after a sleep or from being turned on, or during normal activities on it. Not necessarily processor intensive ones.
    Imac i7, Mac OS X (10.6.2)
  • davidmintzer Level 1 Level 1 (50 points)
    I am feeling for all you people--it must be frustrating. I have found that in the recent pass, Apple has been dropping the ball when it comes to dealing with customer issues (ie. the battery life on the Iphone3GS) I sense that Apple has become to big and is starting to react clumsily to their customer base. In the past, they wouldn't say anything, but in short period of time, the problems would be addressed and FIXED. Now, they don't say anything and it appears that the fix doesn't work.

    I do hope that Jobs and CO. begin to address this emerging problem as their country grows. I think that once you have burned a customer, you could very well lose him for life. Anyway, as shareholder and owner of many Apple products, I don't like what I am seeing.
    Computer, Iphone, Ipod Touch, Mac OS X (10.4.10)
  • fruscinatemaniac Level 1 Level 1 (0 points)
    Right guys, I give up, I've asked for a refund now. Its really not worth it right now. March will be here soon enough and I'm sure they would have worked all this hassle out + there will be a revision in March like last time - this worries me because new revisions mean dealing with this sort of hassle all over again.
    Imac 27" I7

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