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My MacBook air speakers aren't working

My 2012 macbook air speakers, headphone jack, and microphone aren't working. When I go to system preferences and click on sound, it says, "no output devices found." Also, when I press volume up/down/mute, where the bars indicating volume level should be, there is a circle with a line through it. When I try to use Siri, it says "Siri not available, no microphone was found." And no headphones work when I plug them in. Is there an easy way to fix this without taking it into an Apple Store, or is that the only way?

最後更新：2017-10-29 07:16:39

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