iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 96
2010-09-09
Audio: Microphone
Unlikely cause: LCD display, power supply, hard drive, optical drive, fans
Quick Check
Symptoms Quick Check
Audio: Microphone
• Microphone not working
• Microphone audio garbled
• No sound
1. Verify that no tape, sticky notes, or other objects
are blocking microphone located on top of
computer near camera. Microscopic perforations
on top of computer must be free of obstructions
in order for microphone to function.
2. Go to System Preferences > Sound > Input.
Verify that sound input device is set to internal
microphone.
3. Go to System Preferences > Sound > Input.
Verify that “Input volume” setting is set above
minimum level.
4. Go to System Preferences > Sound > Input.
Verify that “Input level” indicator moves when
speaking into microphone.
Deep Dive
Check Result Action Code
1. Verify if boot chime is present
when system is powered
ON. Make sure audio output
preferences are not set to mute.
Yes Go to step 2.
No Reset PRAM and retest.
2. Make sure no cables are
connected to external sound
input/output ports. Go to
System Preferences > Sound >
Input and verify that “Internal
microphone” is an available
option.
Yes Go to step 3.
No Replace audio cable. M09
3. Go to System Preferences >
Sound > Input and verify if
“Input volume” is set above
minimum sensitivity.
Yes Go to step 4.
No Set “Input volume” slider to
middle position. Retest.
4. Go to System Preferences
> Sound > Input and verify
if “Input level” indicator
moves when speaking into
microphone.
Yes Microphone and audio input
functioning. Go to step 6.
No Suspect bad microphone
connection. Reseat
microphone connector on
logic board. Go to step 5.