jgilly26

Q: 2011 iMac 27 graphics card problem?

After updating to Mavericks I have had some sporatic, multicolored, blocks appearing and flashing on my display.

Does anyone have any idea what could be causing it?

Screen Shot 2013-11-23 at 7.56.03 PM.png

 

<Edited by Host>

iMac, OS X Mavericks (10.9)

Posted on Nov 23, 2013 7:37 PM

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Q: 2011 iMac 27 graphics card problem?

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  • by gilligan5000,

    gilligan5000 gilligan5000 Mar 25, 2016 7:35 AM in response to gilligan5000
    Level 1 (4 points)
    Mar 25, 2016 7:35 AM in response to gilligan5000

    Just got the call...after 6 days of being with the genius bar they weren't able to "reproduce the problem".  My guess is that I can take it home tonight and reproduce the problem in 15 minutes, but whatever.  Its not like I expected them to stand behind their product anyway...but it sure would've been nice.

  • by edmundo,

    edmundo edmundo May 16, 2016 3:33 PM in response to gilligan5000
    Level 1 (4 points)
    May 16, 2016 3:33 PM in response to gilligan5000

    It's happening with mine when i play youtube videos since capitan upgrade

     

    iMac (27-inch, Mid 2011)
    Processor 2.7 GHz Intel Core i5
    Memory 16 GB 1333 MHz DDR3
    Graphics AMD Radeon HD 6770M 512 MB

  • by iShinne,

    iShinne iShinne Jun 20, 2016 5:33 AM in response to jgilly26
    Level 1 (4 points)
    Jun 20, 2016 5:33 AM in response to jgilly26

    i have this issue on my iMac 21.5 inch (build mid 2011, AMD Radeon HD 6750M 512 MB) after updateing from 10.8 to 10.10.5 Yosemite.

    That happens after switching the desktops or tabs. mostly a few blocks, sometimes the complete screen is full rgb-colored and a complete freezing.

    SMC Resett and NVRAM resett doesn't work well

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