Diagnostic test won't work....

Discussion in 'iMac' started by Nothingfaced, Sep 10, 2014.

  1. Nothingfaced macrumors member

    Aug 15, 2014
    my imac is having an issue with the screen blacking out randomly, and I have tried to run the diagnostic test but it doesn't work.

    I'll reboot, hold "D", and it simply takes a lot longer than normal to boot up to my regular login menu. No diagnostic test to be found.

    What am I doing wrong?
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    What year model is your iMac. How the test is run varies my age. Give this a look.

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