Apple LATE 2009 manual Audio Built-in Speaker Has No Audio

4.Install known good speaker into location where distorted sound was heard. Verify that sound quality improves.

Yes	Speaker bad. Replace speaker	M09
	and retest.
No	Suspect speaker amplifier.	M09
	Replace audio board.

Audio: Built-in Speaker Has No Audio

Quick Check

Symptoms	Quick Check
Audio: Built-in Speakers Have No	1.	Launch System Preferences and select Sound/
Audio		Output options. Verify that the sound output
• No audio from speaker.		option is set to system’s internal speaker.
• Audio from speaker distorted	2.	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.
	3.	Launch System Preferences and select Sound/
		Output options. . Verify that ‘Balance’ is set to
		middle position
	4.	Reseat PRAM.
	5.	Go to Deep Dive..

Deep Dive

Check		Result	Action	Code
1.	Verify whether boot chime	Yes	Go to step 2
	is present when system is
		No	Audio board not detected by	M09
	powered ON. Note: make sure
			system. Reseat audio board,
	audio output preferences are
			then retest. Replace audio
	not set to mute and volume is
			board if problem persists.
	set to mid-range.
2.	Launch System Preferences and	Yes	Speaker and amplifier
	select Sound/Output options.		circuitry OK. Go to step 3.
	Set speaker balance to the
	middle, then play a sound file.
	Verify that sound is generated	No	Go to step 6.
	by the speaker and that the
	sound quality is acceptable..

2009-11-03 Mac mini (Late 2009) Symptom Charts — Input/Output Devices  65