One USB work, the other doesn't (sometimes)

Discussion in 'MacBook Air' started by toxotis70, Nov 29, 2015.

  1. toxotis70 macrumors member

    toxotis70

    Joined:
    Aug 22, 2007
    Location:
    athens, greece
    #1
    I have a macbook air 11", 2014 model, 4GB RAM , 128GB SSD
    The right USB port works well, with everything i put on it.
    But the other , left one (near power port) doesn't work with some devices.

    For example, it works with a Sandisk usb flash 32GB , but it doesn't work with 2 others (16 an 4 GB) .

    It works with 2 external usb 3 disks (1TB and 2TB) but it doesn't with a simple Logitech mouse !

    What can it be ?
    I run the Apple Diagnostics utility but it didn't shoed anything.

    Is it the logic board ?
     
  2. Meister Suspended

    Meister

    Joined:
    Oct 10, 2013
    #2
    Common problem.
    You can bring it to :apple: and they'll run diagnostics. They'll probably not find anything and send you home.
     
  3. Boyd01 macrumors 68040

    Boyd01

    Joined:
    Feb 21, 2012
    Location:
    New Jersey Pine Barrens
    #3
    I have seen inconsistencies with the USB ports on my 2013 11" MBA too. Can't really put my finger on it because it's intermittent and inconsistent. I use an Apple USB keyboard with a mouse connected, and sometimes for no apparent reason, they fail to be recognized on the left port. But it will work on the other port, or through a USB hub.

    A restart usually clears the problem, although sometimes it takes two restarts. Then I can go for months with no problems. Never tried to diagnose it because it isn't chronic, but I have also seen similar posts here.
     

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