Imac 2009 screen flickers in lion

It's back!  Since upgrading to Lion, the infamous 27" 2009 iMac screen flicker has cropped back up.  Its not so often, and usually not too long after it wakes up.  Anyone else seeing this?  What to do?

Actually, I've just noticed that it also flickers if I tap the right spot during the BIOS bootup (gray screen when laptop first turns on). Disabling the SMS in MacOS didn't make a difference, so I'm going to assume it's hardware and get that logic board that's troubling everyone else replaced...
Thanks for your help...

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  • New iMac 27inch screen flickering/tearing/shutoff (continued)

    This thread is a continuation of [New iMac 27inch screen flickering/tearing/shutoff|http://discussions.apple.com/thread.jspa?threadID=22 12682]. The thread was becoming too long and was causing some browsers to time out. The older thread has been locked.

    citrus101 wrote:
    Hi Brett L,
    thank you for the coordination of this helpful thread. Are you Apple? If yes, please allow me to ask you three questions:
    1) The Display Firmware stopped for over 90% the flicker issue, but what has this Firmware changed exactly?
    2) Is Apple preparing a fix for the yellow tinge?
    3) When will it be save to buy a new iMac?
    Thank you for your efforts.
    Hello Citrus.
    Excellent questions.
    I hope that Apple will authorize Brett L. to provide us with some clear, honest answers to them . . . although, as I pointed out before, it would seem by the latest messages that have been posted in this thread -- that is, the *original thread* -- that through their actions, Apple has already provided us with their answer -- and solution -- to the yellow tinge issue; and that is the replacement of the LCD panel.
    As to what the most recent display firmware update did, I am doubtful that Apple will allow Brett to reveal that kind of information, but we can be hopeful.
    As far as when it will be safe to purchase a new iMac, I seriously doubt that Apple will say anything which would suggest that it is not safe to purchase a new iMac now. What company is going to say "Don't buy our product now. It's not safe"?
    For my part, I have now contacted Apple regarding the issues that I am having with my 27" iMac, and I will wait over the next few days to see how things play out. Based on the testimonies of others here, I don't expect Apple to disappoint. I have the confidence that they want to leave me a satisfied customer who will continue to purchase their products in the future.
    Message was edited by: Warren Beasley

  • 24" iMac Silver - screen flickers

    Just pulled it out of the box today. I can't operate at anything less than full brightness or the screen flickers. I can't find any other posts on this one. I see a lot of other related issues. Anyone having this issue? Did it go away?
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  • IMac 27inch screen flickering

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  • New iMac 27inch screen flickering/tearing/shutoff

    I have been experiencing some problems with the all new iMac 27inch display.
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    Somebody else already made some video-clips about these problems, I am experiencing exactly the same behaviour.
    http://www.youtube.com/watch?v=SjOxlxVz5Os
    http://gallery.me.com/larzy#100025
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    I received my 27" iMac three days ago and ever since i got it out of the box and turned it on it has done the same as the video shows.
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    I cannot believe after three days that this problem is so bad. I spome with Apple this morning on the Apple Care line and they told me to:
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    2. Shut Down and then hold down "D" when turning back on which performed a hardware test...
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    Luckilly i am still within the 14 days of recieving my iMac and they are sending out a replacement but i am worried that this machine will have the same problems...
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  • MacBook (Early 2009) Screen Flickering, Black-out

    So to describe the problem in short, my MacBook is having issues with the screen in random instances. It only seems to happen when I am running some high CPU performance requiring software/games. The screen will turn black about 70% from the bottom up, and the remainder of what is visible will be blinking. Is anyone else expierencing this issue?
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    Sounds a lot like an overheating issue. My son used to run his Mac in his lap with a blanket in his lap. The blanket was not a good thing to be putting the Mac on top of as it trapped all the heat it was making. When he would play an intensive game, something like what you describe would happen until things cooled off.

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    I live in a large property with four independent ring mais. The issue is present on all four rings. I have yet to take the computer elsewhere to possibly eliminate power issues from the problem.
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  • IMac 10,1 screen flickers

    The screen flickers after I have been on the computer for 10-15 minutes.  Back in January, the hard drive failed and was replaced.  Is flickering a sign that the video display is about to die, or something less of a pain in the rear?

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  • IMac 21" late 09: Slow, screen flickering/tearing and odd behavior - the problem that puzzles everyone

    PLEASE HELP!
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    No I didn't. The first time i explained the problem thoroughly and thought that they just couldn't miss such a visual error. I was wrong. The second time the technician wasn't there so i showed the above clip to the salesstaff and explained everything onceagain. Later the technician called me and we talked for 10min.
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    But all other issues aside, what could cause the tearing of the screen as seen int the above clip?

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  • 2012 iMac Screen flickering

    I just bought a brand new, but previous generation 27" iMac a couple of weeks ago, and today I have begun experiencing some noticeable screen flickering.  It doesn't go black, and there is no yellowing.  I have read reports of past iMac flickering problems from 2010, etc, but haven't found much info on those bought in 2012.
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    Just wondering what Apple's stand is on the issue with a flickering and a dark area appearing on imac 27"screen - forums seem to indicate this is not uncommon - and happens through normal use - so should be subject to repair (Sale of Goods Act - ie 6 year warranty)

    We are just users like yourself.  If Apple has stated publicly about the problems you mentioned, it will be listed on their website and/or in one of their Knowledge Base Articles.
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    Page 3,
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