Issue with iMac screen - black

Discussion in 'iMac' started by Nothingfaced, Sep 1, 2014.

  1. Nothingfaced macrumors member

    Aug 15, 2014
    Hey all.

    I have a late 2009 21 inch iMac Core 2 Duo...500GB.

    This thing has run like a champ since I bought it except my bluetooth went out a couple of years ago and had to be serviced. Anyway.

    Starting yesterday, my iMac screen will go black.... but it's not asleep because iTunes will play.

    I will hit the "speedometer" looking button on my wireless keyboard, and the screen will very shortly "flash" where I can see my desktop, but it won't show the dashboard, and it goes black again. I have to restart to get my screen back.

    I've repaired disk permissions and rebooted, but don't know what else to do. Is this a hardware issue or software issue?

  2. killerrobot macrumors 68020


    Jun 7, 2007
    Definitely sounds like a hardware issue. You should be able to run the Apple Hardware Test by holding D and booting off the second install disk. I'd run the extended test (might take 3-4 hours depending on amount of RAM) and see if any errors are discovered.

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