Late 2007 MacBook Pro Randomly Shuts Down

Discussion in 'MacBook Pro' started by bricehulse, May 14, 2013.

  1. bricehulse macrumors newbie

    Joined:
    May 14, 2013
    #1
    I have a late 2007 15-inch MacBook Pro (A1226). It has a 2.20 GHz Core 2 Duo, 5 GB of memory (a stock 1 GB stick and a 3rd party 4 GB stick), and a stock 200 GB 7200 RPM Hitachi hard drive. I have had issues with it shutting down in certain situations.

    (1) The laptop shuts down abruptly whenever I pick it up and walk around with it. This consistently happens within 5 seconds of picking it up. I know for a fact that this never used to be problem. I only started noticing this happening about 5 months ago.

    (2) The laptop randomly shuts down abruptly when I'm using it on a hard stable surface that does not block any vents. This does not necessarily happen when it is under a heavy load. When it happens, the laptop suddenly shuts down and the screen suddenly goes black. I have to wait about 5 to 10 minutes for it to be willing to turn back on again. This happens one to three times a day, and it is completely unpredictable. Below is a graph of various temperatures up until the point when it shuts down. None of these temperatures are high enough for me to suspect that this issue is caused by overheating.

    [​IMG]

    I would really appreciate it if anyone had any insight into why these random shutdowns are happening. Thanks!
     
  2. thundersteele macrumors 68030

    Joined:
    Oct 19, 2011
    Location:
    Switzerland
    #2
    With this model, I would bet on a failing graphics card (the usual 8600GT problem). Essentially this means you should start saving up for a new laptop.

    The hard drive is the other possible suspect, due to the machine shutting down upon movement.

    I think you can run the Apple hardware check, the graphics card bug shows up there usually.
     
  3. Gav2k macrumors G3

    Gav2k

    Joined:
    Jul 24, 2009
    #3
    It's your sudden motion sensor.

    Google how to disable it and see if your issue persists after.
     
  4. bricehulse thread starter macrumors newbie

    Joined:
    May 14, 2013
    #4
    Thanks for the advice. Three years ago, the GPU completely failed and just showed static on the screen, but I took it to the genius bar and they replaced the whole logic board for free. I guess that I will have to choose between buying a new logic board or buying one of the updated MacBook Pros I expect they'll announce at WWDC.

    Thanks! I'll try disabling it.
     
  5. bricehulse thread starter macrumors newbie

    Joined:
    May 14, 2013
    #5
    Okay, so I disabled the sudden motion sensor, but that did not resolve the problem.

    I also ran the 3-minute Apple Hardware Check, and it detected no problems. Tomorrow, I will run the hour-long version and report back.

    Also, I am planning on replacing my hard drive with an SDD soon, so maybe that will solve this problem.

    Thanks for all your help!
     
  6. bricehulse thread starter macrumors newbie

    Joined:
    May 14, 2013
    #6
    I disabled the sudden motion sensor, and that made no difference. I also ran the extended Apple Hardware Test, and it detected no troubles. Any other ideas?
     

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