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Q: iMac - Crackling sound comes and goes (left speaker)

My 2008 iMac has randomly been making a crackling sound from the left speaker. This sound just happens randomly even when I am not playing music or have mute on. The crackling sound goes away when I plug in headphones or external speakers. Any ideas what this is and how to fix this?

iMac, OS X El Capitan (10.11)

Posted on Sep 21, 2016 3:56 PM