Apple LATE 2009 manual Symptoms Quick Check USB Devices Not Recognized

USB Devices Not Recognized

Quick Check

Symptoms	Quick Check
USB Devices Not Recognized	1.	For printers and external USB drives, make sure
• USB wired keyboard/mouse not		any external power source is plugged in and
recognized		operating to isolate a power issue with the
		device.
• USB external drive not
	2.	The system has 5 USB ports on the rear of the
recognized
• USB printer not recognized		computer. Make sure to try each port to isolate a
		particular port malfunction.
	3.	Test with a known good wired keyboard or
		mouse to isolate a failed peripheral issue.
	4.	Test with a known good USB cable when dealing
		with a printer or external USB drive, to isolate a
		USB cable issue.
	5.	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 USB devices from	Yes	Test in all USB ports to ensure
	the computer except for the		all USB ports working as
	keyboard and mouse. Start		expected. Replace logic board
	the computer and reset PRAM.		for any port failures.
	Are the keyboard and mouse
		No	Possible logic board failure.
	recognized?
			Go to step 2
2.	Did Bluetooth Mouse Setup	Yes	Bluetooth detected via
	assistant launch after startup?		Internal USB, but external USB
			devices not recognized. Go to
			step 3
		No	Bluetooth not recognized
			via internal USB. Disconnect
			mouse and keyboard. Go to
			step 4

2009-11-03 Mac mini (Late 2009) Symptom Charts — Input/Output Devices  69