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Helpful answers
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Jan 26, 2015 11:21 AM in response to nytefall78by Kappy,Most likely the LCD panel is failing and needs to be replaced - very expensive. If that's not it then the GPU may be failing - also expensive.
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Jan 26, 2015 11:25 AM in response to nytefall78by Old Toad,If your 27" mid 2011 iMac qualifies for this recall, iMac (27-inch): AMD Radeon 6970M Video Card Replacement Program - Apple Support, contact your nearest Genius bar for an appointment and have it diagnosed. If the problem is the graphics card it should be covered under the warranty.
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Feb 22, 2015 7:30 PM in response to nytefall78by nytefall78,they have replaced the the graphics card and the problem remains..the computer remains on after the screen goes black... after a while i can go back and the screen will come back on.
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