Previous Shutdown Cause: -128

Discussion in 'MacBook' started by braidednation, Jul 4, 2009.

  1. braidednation macrumors newbie

    Jul 4, 2009
    I have a Macbook that will decide to stop and sometimes restart. But most of the time it is just dead. Sometimes a COPR will work, but often, it will load os and then shutdown.

    I have no battery in the unit.

    Checked the logs and get the following

    Previous Shutdown Cause: -128

    If anyone knows what that code is..what does it mean?
    Is there a way of finding out what all the codes mean, does apple have a list of code numbers???

  2. charlus macrumors newbie

    May 1, 2010
    Hi All,
    I've got a similar problem since a few weeks.
    My macbook 13.3" ( macbook 5,1 Core 2 duo 2,4GHZ ) 2008 model seems to have a similar problem ( Running 0SX 10.6.3 )
    When I'm on battery ( display saying I still have 1h left before being empty ), the macbook shutdowns without any warning. When I want to power it on, it turns off almost immediately, unless I plug in the adaptor.

    Looking at the logs, I find this : Previous Shutdown Cause: -128
    This is the first post I can find reporting the same error code..

    I've recently replaced the original HD with a Samsung 320GB 7200rpm, battery lifetime has been reduced but at least I should get a correct reading on the battery monitor.
    Here's what the battry info states:
    135 Cycles, Santé 82%
    Capacité originale 4100mAh
    Capacité actuelle 3353mAh

    Not perfect, but should still be good ( I think )

    Any Idea of what can be wrong and how to fix it ?
    Thanks in advance !
  3. pierrelin macrumors newbie

    Jul 5, 2010

    I've had a similar problem for the last few months with a 24" iMAC (2.93GHz Intel Core 2 Duo) it would randomly shutdown just when browsing the internet or some other not too strenuous task and give a Previous Shutdown Cause -128.

    I took it to the mac store (as it was still under warranty) they had never heard of a similar problem and didn't know what -128 meant so the ran some diagnostic tests and replaced the video card (NVIDIA GeForce GT 120). However this didn't fix the problem so i took it back again and they ran some more test and replaced the front Bezel.

    It has worked fine until recently when i tried to play a game using Steam and it shutdown again giving -128 as the cause, has anyone had a similar problem and did they manage to fix it?

  4. kevrayner macrumors newbie

    Feb 19, 2011
    If anybody know what causes this please let me know as i am at the end of my rope with my imac


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