iMac sometimes Shut's Down Randomly!

Discussion in 'Mac Basics and Help' started by partylikearock, Mar 27, 2010.

  1. partylikearock macrumors newbie

    Joined:
    Mar 27, 2010
    #1
    So my iMac has been shutting down randomly. Why is this happening?

    Specs:

    Hardware Overview:

    Model Name: iMac
    Model Identifier: iMac7,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 4 MB
    Memory: 2 GB
    Bus Speed: 800 MHz
    Boot ROM Version: IM71.007A.B03
    SMC Version (system): 1.20f4

    System Power Settings:

    AC Power:
    System Sleep Timer (Minutes): 0
    Disk Sleep Timer (Minutes): 10
    Display Sleep Timer (Minutes): 15
    Sleep On Power Button: Yes
    Automatic Restart On Power Loss: No
    Wake On LAN: No
    Current Power Source: Yes
    Display Sleep Uses Dim: Yes

    Hardware Configuration:

    UPS Installed: No

    Intel ICH8-M AHCI:

    Vendor: Intel
    Product: ICH8-M AHCI
    Speed: 3 Gigabit
    Description: AHCI Version 1.10 Supported

    WDC WD3200AAJS-40RYA0:

    Capacity: 320.07 GB (320,072,933,376 bytes)
    Model: WDC WD3200AAJS-40RYA0
    Revision: 12.01B03
    Serial Number: WD-WCAPZ2146627
    Native Command Queuing: Yes
    Queue Depth: 32
    Removable Media: No
    Detachable Drive: No
    BSD Name: disk0
    Partition Map Type: GPT (GUID Partition Table)
    S.M.A.R.T. status: Verified
    Volumes:
    Macintosh HD:
    Capacity: 286.69 GB (286,689,067,008 bytes)
    Available: 259.02 GB (259,015,827,456 bytes)
    Writable: Yes
    File System: Journaled HFS+
    BSD Name: disk0s2
    Mount Point: /
    Windows:
    Capacity: 33.04 GB (33,039,892,480 bytes)
    Available: 2.73 GB (2,730,393,600 bytes)
    Writable: No
    File System: NTFS
    BSD Name: disk0s3
    Mount Point: /Volumes/Windows
     
  2. Gregg2 macrumors 603

    Joined:
    May 22, 2008
    Location:
    Milwaukee, WI
    #2
    ...with no warning message when it happens?

    Do you have a log? It might seem random to you until you start recording what you were doing right before it happens.
     
  3. partylikearock thread starter macrumors newbie

    Joined:
    Mar 27, 2010
    #3
    No it didn't have any error messages or Log messages and no recovered files.
     
  4. Bacong macrumors 68000

    Bacong

    Joined:
    Mar 7, 2009
    Location:
    Westland, Michigan
    #4
    Has to be overheating. Download iStat pro or something similar and tell us your fan speeds.
     
  5. partylikearock thread starter macrumors newbie

    Joined:
    Mar 27, 2010
  6. BlueRevolution macrumors 603

    BlueRevolution

    Joined:
    Jul 26, 2004
    Location:
    Montreal, QC
  7. Bacong macrumors 68000

    Bacong

    Joined:
    Mar 7, 2009
    Location:
    Westland, Michigan
    #7
    Your fans are going really, really slow though. Download smcfancontrol or FanControl and crank the speeds up to at least 3500 RPM and tell us if it shuts down.
     
  8. BlueRevolution macrumors 603

    BlueRevolution

    Joined:
    Jul 26, 2004
    Location:
    Montreal, QC
    #8
    I have an early 2008 iMac and am getting similar speeds. I don't think that's the problem. There's no need for the fans to spin fast if the computer isn't running hot.

    When you took that screenshot, how long had your computer been running? Were you doing anything particularly taxing at the time? Is there any correlation between how hard your computer is working and when it shuts down?
     

    Attached Files:

  9. Bacong macrumors 68000

    Bacong

    Joined:
    Mar 7, 2009
    Location:
    Westland, Michigan
    #9
    There's nothing wrong with running the fans faster than default, it makes your components last longer and a fan is the cheapest thing to replace.
     
  10. partylikearock thread starter macrumors newbie

    Joined:
    Mar 27, 2010
    #10
  11. Bacong macrumors 68000

    Bacong

    Joined:
    Mar 7, 2009
    Location:
    Westland, Michigan
    #11
    If it's only happened twice in the past 4 months it leads me to believe it's overheating due to intensive usage.
     
  12. partylikearock thread starter macrumors newbie

    Joined:
    Mar 27, 2010
  13. BlueRevolution macrumors 603

    BlueRevolution

    Joined:
    Jul 26, 2004
    Location:
    Montreal, QC
    #13
    Depends. If the fans (and temperature sensors) are behaving properly, you'd hear them revving up prior to shutdown. If they're not, that could be the reason. What were you doing at the time?
     
  14. partylikearock thread starter macrumors newbie

    Joined:
    Mar 27, 2010
    #14
    Well my mom was logged in and she probably had:
    - Mail
    - Safari
    - And Photoshop

    And I was logged in and I was doing:
    - Mail
    - Safari

    I dont think those applications would make your computer over heat.
     
  15. Bacong macrumors 68000

    Bacong

    Joined:
    Mar 7, 2009
    Location:
    Westland, Michigan
    #15
    It could be anything, especially if it's so rare (twice in 4 months)

    Could be overheating like I said. It could be a power surge, problems with your electrical in your home, or any multitude of things. The best advice I can give is to take it to an Apple Store.

    If you're not up for that, the next time it shuts down, take note of a few things. Is the computer abnormally hot? is the power supply really hot? If not, then it's probably your logic board, which isn't fun.
     
  16. partylikearock thread starter macrumors newbie

    Joined:
    Mar 27, 2010
    #16
    Well the power outlets and my new basement was done fairly new. Approximately 4-5 years ago. I guess I need to take my iMac in for servicing. Is there anything specific I should ask the apple geeks? (no pun intended) :apple:
     
  17. BlueRevolution macrumors 603

    BlueRevolution

    Joined:
    Jul 26, 2004
    Location:
    Montreal, QC
    #17
    $20 says you'll get it back with a $60 bill and a receipt that say they couldn't find a problem. I'd wait to see if it happens again.

    However, if you haven't done so, and if the computer is still eligible, I suggest purchasing AppleCare extended coverage.

    [​IMG]
     
  18. partylikearock thread starter macrumors newbie

    Joined:
    Mar 27, 2010
    #18
    haha I giggled at the commic :p
    Ok.. yeah apple are the kinds of people who charge outrageous stuff.
     
  19. partylikearock thread starter macrumors newbie

    Joined:
    Mar 27, 2010
  20. BlueRevolution macrumors 603

    BlueRevolution

    Joined:
    Jul 26, 2004
    Location:
    Montreal, QC
    #20
  21. Gregg2 macrumors 603

    Joined:
    May 22, 2008
    Location:
    Milwaukee, WI
    #21
  22. partylikearock thread starter macrumors newbie

    Joined:
    Mar 27, 2010
    #22
    I have the one with the black border not going all the way to the side.
     

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