Apple Mac mini Manual De Usuario

Mac mini (Mid 2010) Symptom Charts — Input/Output Devices 

2010-08-03

4.  Open the Apple System Profiler. 

Selecting USB, do you see “IR 

Receiver” listed?

Yes

IR Receiver reporting on USB 

bus. Check for IR cable. Go to 

step 5

No

Remove bottom cover, and 

fan, and reseat the IR sensor 

connection to logic board. 

Replace any damaged IR 

sensor cable assembly. Go to 

step 5.

5.  Remove bottom cover, 

disconnect AirPort antenna 

and remove shield, disconnect 

and remove fan and cowling, 

then disconnect IR/LED sensor 

cable and connect a known-

good sensor assembly to logic 

board to verify that IR sensor 

functionality is restored.

Yes

Take apart system to access 

the IR lens and sensor ,and 

verify that they are correctly 

installed and not blocked 

by any foreign element. If 

correctly installed, replace IR 

sensor cable assembly.

No

Replace logic board (IR 

controller is located on logic 

board). 

Distorted Sound
•  No audio from built-in speaker.
•  Audio from speaker is distorted

1.  Launch System Preferences and select Sound/

Output options. Verify that the sound output 

option is set to system’s internal speaker and that 

the balance control is set to the center position. 

2.  Obtain known good high quality sound file 

or use iTunes music store sound samples to 

evaluate sound quality. Verify suspect sound files 

on another system to determine whether the 

distortion is caused by the system or the sound 

file.

3.  Set volume control to mid-range. Overdriving the 

built-in speaker can cause distortion.