Macbook pro headphone output jack faulty,

Only left headphone working, have tired using 5 different types of headphones to make sure it isn't the headphones. A buzzing sound come from the left headphone and the song is distorted on full volume with beats headphones. Is it that the output jack is broke?

investigate more >System Preference>Sound
~/Applications/Utiliites/Audio Midi Setup
Try resetting PRAM
http://support.apple.com/kb/ht1379

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