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  1. #1

    Member Since
    May 28, 2011
    MB does not start up anymore
    My MacBook (MB) does not want to start up anymore.

    Most of the time, the screen just stays black with the little light going on and of (stand-by light). If not that, I get the white screen with the apple-logo but nothing happens.

    It's since several weeks like this and this is what I tried so far:

    - Starting up with resetting parameters RAM: no effect
    - Cleaning and completely erasing my Hard Drive: no effect
    - Reinstalling OSX: no effect
    - Taking out the two RAM modules and switching their place: no effect
    - Running Smart Utility: says that my HD is okay
    - Running Applejack:
    After having installed Applejack and having restarted my MB, a black screen appreared with all kinds of things running on it. It stopped doing anything with the sentence:

    BSD process name corresponding to current thread: kernel_task

    The computer did not do anything anymore then so I just hold down the switch-on button to shut it down.

    Is my logic board dead?

    Thanks for advise,


  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Fort Worth, Texas
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, El Capitan
    Your logic board is probably OK. Try to start the machine in Safe Boot Mode: Hold down the shift key as soon as you hear the chime. Let's see if it boots.

    You should also try booting the machine with your original startup DVD if the safe boot doesn't work. Let us know what happens.

  3. #3

    Member Since
    May 28, 2011
    I had the same issue and it was the cable from the hard drive to the logic board. Very easy to change yourself.

  4. #4

    Member Since
    May 28, 2011
    Thanks for all advise so far.

    I started up with the original startup dvd and it worked well. Without that cd however, it doesn't start up.

    I opened up the computer and the cable to the logic board, from the HD, is okay.

    I'll still try to start up with the shift key and let you know. I really hope this problem gets solved!


  5. #5

    Member Since
    May 28, 2011
    @ mgriffin13:

    Was your cable between HD and logic board broken? I mean did you have to put in a new cable?

    If yes, how did you discover the cable was dead?


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