HT201177: Get help with video issues on external displays connected to your Mac

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Emma_Jacqueline

Q: Every time I turn on my Mac, the regular white screen with the apple logo appears, but the screen goes black and shuts off. Why?

Why is this happening to my computer??

iMac

Posted on Jul 10, 2013 1:44 PM

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Q: Every time I turn on my Mac, the regular white screen with the apple logo appears, but the screen goes black and shuts off. Why?

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  • by rkaufmann87,

    rkaufmann87 rkaufmann87 Jul 10, 2013 2:21 PM in response to Emma_Jacqueline
    Level 9 (58,466 points)
    Photos for Mac
    Jul 10, 2013 2:21 PM in response to Emma_Jacqueline

    Emma,

     

    Getting answers is made a little more easy if you complete a profile. This helps us learn about what verison of OS X is installed, which iMac you have etc. My guess is you may not know how, if I am correct please click https://discussions.apple.com/docs/DOC-3602 for instructions.

     

    Have you run Apple Hardware Test in extended mode 2-3 times in succession? If not and if you don't know how navigate to support.apple.com/kb/ht1509 for instructions.