iMac randomly shuts off

Discussion in 'iMac' started by amateurist, Feb 29, 2016.

  1. amateurist macrumors newbie

    Joined:
    Apr 26, 2009
    #1
    I've got a late 2013 iMac that since this morning suddenly shut off.
    To turn it on again I had to wait a few minutes before I was able to use the power button and then after 10 minutes or so it shut off again.

    When I look in console it says: kernel: Previous Shutdown Cause: 0

    I ran the AHT, but no results.

    Also did a PRAM reset but it's still shutting off.


    these are the specs:

    NVIDIAGeForceGTX780M 4GB GDDR5
    3.5GHz Quad-core Intel Core i7
    32GB 1600MHz DDR3 SDRAM-8GB
    1TB Fusion Drive

    any idea how to solve this? thanks
     
  2. BrianBaughn macrumors 601

    BrianBaughn

    Joined:
    Feb 13, 2011
    Location:
    Baltimore, Maryland
    #2
    Are you running any non-OS X background apps (cloud syncing, backup, VPN, password, remote access etc.)?
     
  3. amateurist thread starter macrumors newbie

    Joined:
    Apr 26, 2009
    #3
    i have a vpn running but not sure if that's to blame since sometimes the imac also turns off during start up before any of that has had a chance to load
     
  4. BrianBaughn macrumors 601

    BrianBaughn

    Joined:
    Feb 13, 2011
    Location:
    Baltimore, Maryland
    #4
    Probably not the issue then.

    From what I've seen "Previous Shutdown Cause: 0" is a power failure. Doesn't narrow it down much, though.

    Those kind of shutdowns can cause software issues such as directory corruption.

    I've heard about iMac shutdowns being caused by hardware failures. A faulty hard drive or hard drive connector is a possibility. The equivalent of a "short circuit" somewhere.
     

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