HT201257: Using Apple Hardware Test
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Q: My iMac internal mic is not working.
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Nov 12, 2012 8:36 PMby RRFS,Two things to look at; first Open System Report and see if your Mic is listed under the USB devices... if not try a
SMC RESET
http://support.apple.com/kb/HT3964
- Shut down the computer.
- Unplug the computer's power cord and ALL peripherals.
- Wait 15 seconds.
- Attach the computers power cable.
- Wait another 5 seconds and press the power button to turn on the computer.
- It is the 5 second timing that initiates the reset.
and see if it has reappeared. If it's still not there then it may be a component failure.
