MacBook Pro boot problems

Discussion in 'Mac Basics and Help' started by kelsier93, Jun 4, 2017.

  1. kelsier93 macrumors newbie

    Jun 4, 2017

    my MacBook Pro late 2012, 13" bought sep. 2014 has some strange problems.

    It all startet when i was trying to wake it up after sleep mode. The screen stayed black and i had to reboot holding the on/off button.
    These problems occurred more often and one day it didn't even start anymore. So i did some research and bought and installed a new SSD HD (Samsung 500 GB, before i had the 128 Apple SSD).

    Setting up the OS went fine and no problems occurred. But since 2 weeks the problems are back. But slightly different:
    Now i can't boot from recovery anymore (Prohibitory symbol), boot process for OSX 10.9 needs about 20 sec (3 sec when it was all new) and the black screen after sleep mode.

    Today i deleted the SSD, formatted it and tried to install 10.9 and sierra again. Both failed after the reboot when you should be able to set up your Mac. I tried and failed to boot also in target mode. Recovery won't boot, too. (Prohibitory symbol again)
    But i can start the Mac from my Time Machine and external HD. So when i run Disc Utility, it says the HD is fine.

    Any suggestions what i could try, before going to the local reseller?

    Thanks for your help,

  2. smallcoffee macrumors 65816

    Oct 15, 2014
    North America
    What do you mean by this? Prohibitory symbol?
  3. kelsier93 thread starter macrumors newbie

    Jun 4, 2017
    This one

    Attached Files:

  4. Fishrrman macrumors G5


    Feb 20, 2009
    It might be a failure of the internal SATA drive ribbon cable. This is common on the 2012 models. The faster speed of an SSD may actually worsen the problem.

    I believe there is a FREE cable replacement upgrade available at Apple Stores.

    If you have one anywhere close, it might be worth the trip to take it to them and let them check it out. Might solve all your problems right away.
  5. KuroAkita macrumors newbie

    Jun 18, 2017
    If you need to you could look at this site, i got my macbook fixed for this same exact issue there.
  6. Audit13 macrumors 68030


    Apr 19, 2017
    Toronto, Ontario, Canada
    If there is no apple store close to you, you can buy replacement cables from Amazon.

    I got a cable from Amazon for a 2009 15" and 2010 13" MBP. Both cables brought the units back to life. It's only been about 2 months but I'm hoping to get a couple of more years from these MBPs.

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