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Thread: No Sound

  1. #1


    Member Since
    May 18, 2009
    Posts
    3
    No Sound
    I'm fairly new to macs so I hope you can help a newbee at this. Today i played music from my Macbook Pro via a cable plugged into my headphone port and into my amp. Everything was great until i unplugged and now no sound will play out of my macs own speakers. What have i done wrong? There is a red light on in the headphone port if that helps anyone?

  2. #2

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    28,900
    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    It's stuck in Optical Digital mode for the Tos-Link cable. Try plugging the plug back in and out a couple of times and see if the sound comes back.

  3. #3


    Member Since
    May 18, 2009
    Posts
    3
    Tried that. Still no luck. Any other ideas?

  4. #4

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    28,900
    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    Try this tip:

    It sounds like it is jammed in optical audio out mode.

    There's a microswitch that turns the port on and off. Looking into the port, the switch is a small metal thing near the back of the port, on the right side. Take a toothpick or some similar object and poke at the switch until it unsticks and the light goes off.

    Also I saw it suggested to try the headphones in and out 10 or more times.

    Also another Tip was to reset the PMU. Shut down your Macbook Pro, disconnect the magsafe adapter, and remove the battery. Press and hold the power button for at least 5 seconds.

  5. #5


    Member Since
    May 18, 2009
    Posts
    3
    A bit more in and out and its working. Thanks for your help.

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