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Helpful answers
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Sep 26, 2016 12:31 PM in response to Orion1791by lllaass,Try resetting the SMC
Reset the System Management Controller (SMC) on your Mac - Apple Support
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Sep 27, 2016 6:53 AM in response to lllaassby Orion1791,Thanks. Did SMC reset but it didn't solve the problem. Reinstalled OS Sierra again but still no speaker sound and even settings for speakers.