mbp unibody - one of the USBs isn't working properly?

Discussion in 'MacBook Pro' started by zebbz, Feb 10, 2010.

  1. zebbz macrumors member

    Joined:
    Sep 11, 2008
    Location:
    London
    #1
    i've got a macbook pro unibody
    the october 08 ones

    and basically of the two usb ports
    the lower one is working fine
    but the top one is acting a bit funny

    if i put my mouse or graphics tablet in there it doesnt work
    but if i put my phone or usb drive in there they work perfectly

    not sure what other tests to do or what it could be and wondering if anyone has any ideas??
     
  2. Anawrahta macrumors member

    Joined:
    Sep 9, 2005
    Location:
    亞洲
    #2
    Are you using the original AC adapter that came with the computer?

    Does the lower one act funny even with nothing plugged into the top one?

    What kind of phone? iPhone?
     
  3. Habitus macrumors 6502a

    Habitus

    Joined:
    Feb 26, 2009
    Location:
    Where ever my life takes me...
    #3
    Do you have AppleCare? That sounds like a logic board issue. Time to call AppleCare.

    Good luck,

    Habitus :apple:
     
  4. iBunny macrumors 65816

    Joined:
    Apr 15, 2004
    #4
    Both of my USB ports are funny. Sometimes they work.. Sometimes they dont.

    It usually is with External Hard Drives... I have to plug them in and out a bunch of times before OSX will reckognize.
     
  5. MacModMachine macrumors 68020

    MacModMachine

    Joined:
    Apr 3, 2009
    Location:
    Canada
    #5
    the usb ports on the macbook's and pro's can share usb power, there is 1000mah between them.

    the list in the profiler as 500 per port but can be shared , if you plug in a power hungry device it can steal all the power from the other device.

    this was recently done on the unibody's....not sure why.
     
  6. Dozerrox macrumors 6502

    Joined:
    Dec 23, 2009
    Location:
    Exeter
    #6
    One of the macbook pro's usb ports isn't fully powered as it runs the webcam etc from it. I expect this is your problem.
     
  7. zebbz thread starter macrumors member

    Joined:
    Sep 11, 2008
    Location:
    London
    #7
    thanks everyone for the replies


    yeah im using the original ac adapter

    no the bottom one is completely fine

    not iphone, blackberry, so basically mass storage device

    i would have thought something like a mouse would hardly need any power at all
    it doesnt work even with nothing in the bottom (working fine) usb
    so i dont think its to do with the power being shared between the 2 ports



    i have applecare fortunately, so might have to resort to that..



    but this has never happened before, just recently so i dont think its to do with one being less powered as it would have been like this all the time no?
     
  8. zebbz thread starter macrumors member

    Joined:
    Sep 11, 2008
    Location:
    London
    #8
    rebooted it, and it seems to be working fine.

    strange.
     

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