The built-in mic is work still when the external MIC plug in the Line-in port after.
I have a MAC's microphone and a PC's mic, the connector is all 3.5 mm, but the MAC's is longer than the PC's connector and can not plug complete in to the Audio Line-In port of the PowerBook G4 867 12" .
The internal microphone is not disconnected when the external plugging in. The external mic is not work, but built in mic is work still.
But no another option in the sound panel, built in mic is a choice only (when a mic connected to the audio in port).
The internal mic is disconnected when the proper type microphone jack is inserted. Try using the correct Apple mic for this model. What kind of microphone are you plugging in?
Thanks for your answer! I plugging in to the audio LINE-In port use a PC's normal microphone . Maybe the PC microphone is not working with the PowerBook g4 Audio Line-IN port.
You have to go to the sound panel in the system preferences and select the option of your choice (when a mic is connected to the audio in port it will appear in the selection ).
Thanks! I'll try it!
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