Question about Apple MacBook Mac Notebook
This is a common complaint. The key to the diagnosis is that your MacBook is saying "Digital out, built-in output" instead of "Internal speakers, built-in output."
The output jack on this model supports both traditional and optical plugs. A mechanical sensor inside the jack tells it which is inserted. The problem is that the jack is somewhat fragile, and some plugs can nudge the sensor out of position, in which case it thinks an optical plug is permanently inserted.
If one has great repair skill, one can sometimes jiggle the connector back into position with a small pick (make sure the power is disconnected and the battery is out, if it is removable). Sometimes inserting a conventional plug into the jack several times will correct the condition. Otherwise, you should bring it in for repair and insist that it is a widely-encountered product defect.
More information at forums.macrumors.com.
Posted on May 16, 2010
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Posted on Jan 02, 2017
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