Справочник Пользователя для Apple LATE 2009

Mac mini (Late 2009) Symptom Charts — Input/Output Devices 

 2009-11-03

Install known good speaker 

into location where distorted 

sound was heard. Verify that 

sound quality improves.

Yes

Speaker bad. Replace speaker 

and retest. 

No

Suspect speaker amplifier. 

Replace audio board.

No audio from speaker.

• 

Audio from speaker distorted

• 

Launch System Preferences and select Sound/

Output options. Verify that the sound output 

option is set to system’s internal speaker. 
Launch System Preferences and select Sound/

Output options. Verify that the ‘Output Volume’ 

setting is set above the minimum level and that 

the ‘mute’ option is not selected. 
Launch System Preferences and select Sound/

Output options. . Verify that ‘Balance’ is set to 

middle position
Reseat PRAM.

Go to Deep Dive..

Verify whether boot chime 

is present when system is 

powered ON. Note: make sure 

audio output preferences are 

not set to mute and volume is 

set to mid-range.

Yes

Go to step 2

No

Audio board not detected by 

system. Reseat audio board, 

then retest. Replace audio 

board if problem persists.

Launch System Preferences and 

select Sound/Output options. 

Set speaker balance to the 

middle, then play a sound file. 

Verify that sound is generated 

by the speaker and that the 

sound quality is acceptable..

Yes

 Speaker and amplifier 

circuitry OK. Go to step 3.

No

Go to step 6.