Apple LATE 2009 manual Check, Action Code, P04

Deep Dive

Check	Result	Action	Code
1. Run Apple Hardware Test or	Yes	Suspect possible fan or
Apple Server Diagnostics. Was		sensor error. Check fan
an error generated?		cable connection to the
		interconnect board.
	No	Go to step 2.

2. Does noise sound like fan	Yes	Reset SMC by disconnecting
running faster than expected?		power cord for ~15 seconds
		then retest. If issue continues
		go to step 3.
	No	Go to step 5.
3. Does the noise change when	Yes	Suspect issue with optical
the optical drive is being		drive or the media being
accessed or media is inserted		used. Jump to ‘Optical Drive
or ejected?		Noisy’ symptom flow for
		additional information.
	No	Go to step 4.
4. Mute the system volume. Verify	Yes	Go to step 5.
whether the issue still occurs.
	No	Suspect issue with speaker
		or audio circuitry. Jump
		to ‘Distorted Sound
		From Internal Speakers’
		symptom flow for additional
		information.
5. Remove fan and rotate the	Yes	Go to step 6.
blades. Verify that fan blades
spin smoothly without
	No	Replace fan.	P04
interference from fan housing.

2009-11-03 Mac mini (Late 2009) Symptom Charts — Startup and Power  32