MBP MacBook Pro powers down unexpectedly

Discussion in 'MacBook Pro' started by PierreDominus, Apr 3, 2018.

  1. PierreDominus macrumors newbie


    Apr 3, 2018
    Please, any experts out there at interpreting an error report?

    My MacBook Pro Mid 2015 High Sierra powers off unexpectedly even when power lead is connected.
    And sometimes only boots on second or third attempt.

    Error report is for when it powered off....
    Any ideas please how you would trouble shoot this and fix it?

    I have reset NVRAM and SMC


    *** Panic Report ***
    panic(cpu 0 caller 0xffffff7f8209c58b): "DSB0: thunderbolt power on failed 0xffffffff\n"@/BuildRoot/Library/Caches/com.apple.xbs/Sources/IOPCIFamily/IOPCIFamily-320.30.2/IOPCIBridge.cpp:1296
    Backtrace (CPU 0), Frame : Return Address
  2. maflynn Moderator


    Staff Member

    May 3, 2009
    If its a repeatable issue, you may be dealing with a hardware failure.

    Did you try running Apple's Hardware Test? I'd also given Apple a call and make an appointment for them to check the laptop out.
  3. Samuelsan2001 macrumors 604

    Oct 24, 2013
    Do you have any thunderbolt attached peripherals?
  4. PierreDominus thread starter macrumors newbie


    Apr 3, 2018
    Hi All, Thanks for the help..
    No attached peripherals at all.
    Not heard of this hardware test bit googled it and ran it and it didn't show any problems...
    Hoping I can fix this without involving Apple as I'm out of warante...
  5. buran-energia macrumors regular

    Oct 9, 2017
    You can always try wiping out everything, doing a fresh OS install and making sure it's the latest version. If this is still happening with no third party software installed or hardware, then it's probably some sort of hardware issue.
  6. treekram macrumors 68000

    Nov 9, 2015
    Honolulu HI

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