Apple LATE 2009 manual FireWire Devices Not Recognized

FireWire Devices Not Recognized

Quick Check

Symptoms	Quick Check
FireWire Devices Not Recognized	1.	For external FireWire drives, make sure any
• FireWire external drive not		external power source is plugged in and
recognized		operating to isolate a power issue with the
		device.
• FireWire printer not recognized
	2.	Test with a known good FireWire device to isolate
		a failed peripheral issue.
	3.	Test with a known good FireWire cable to isolate
		a FireWire cable issue.
	4.	Ensure that all available Software Updates have
		been applied to the computer for access to the
		latest bug fixes.

Deep Dive

Check		Result	Action	Code
1.	Unplug all FireWire devices	Yes	Issue resolved
	from the computer. Start the
		No	Possible logic board failure.
	computer and reset PRAM.
			Go to step 2
	Reconnect the FireWire device
	in question. Is the FireWire
	device recognized?
2.	Use a known good FireWire	Yes	Try the FireWire device in
	cable with a known good		question with a known good
	FireWire device (another		computer of the same make
	Mac in FireWire Target Disk		and model. Go to step 3
	mode is good). Is this device
		No	FireWire not recognized.	M12
	recognized?
			Replace main logic board.
3.	Is the FireWire device	Yes	Test the FireWire device with
	recognized on a known good		a known good cable on user’s
	computer of the same make		computer. Go to step 4
	and model?
		No	FireWire device may need
			additional power. Use a
			powered FireWire hub. Go to
			step 5

2009-11-03 Mac mini (Late 2009) Symptom Charts — Input/Output Devices  67