Sleep wakeup screen issue

Discussion in 'iMac' started by cobrasneverdie, Oct 2, 2010.

  1. cobrasneverdie macrumors member

    Jul 27, 2010
    I don't think I should be worried about this, but when my imac is in sleep mode, and I turn it on with the black screen and the login info. There are green little dots on my screen scattered... I should try and take a picture of it. I tried to command shift 3 but I couldn't

    This happens sometimes. anyone know the cause of it? screen related?
  2. TMRaven macrumors 68020


    Nov 5, 2009
    Do you only get it from waking up from sleep? How about regular booting up? Can you put it back to sleep, then wake it up again, and the problem will disappear?

    At first I wanna say it's a power supply issue. But things are hard to diagnose with computers: it could also be logic board or gpu.
  3. cobrasneverdie thread starter macrumors member

    Jul 27, 2010
    it's just through sleep mode right now, does not come on at all during normal usage or booting it up
  4. Hellhammer Moderator


    Staff Member

    Dec 10, 2008
    Try SMC and PRAM reset. Run Disk Utility as well. Sounds like it's a graphics glitch if it only occurs when waking up from sleep.
  5. cobrasneverdie thread starter macrumors member

    Jul 27, 2010
    thanks mang! I'll try that, time to use el google!:D

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