Apple MD094LL/A manual Wired Keyboard Does Not Function Properly

Wired Keyboard Does Not Function Properly

Quick Check

Symptoms	Quick Check
Wired Keyboard Does Not	1.	Reset SMC
Function Properly	2.	Open System Preferences > Universal Access >
• Some or all keys on the
		Mouse & Trackpad and verify that Mouse Keys
keyboard don’t work
		is turned OFF. When enabled, Mouse Keys can
• Eject key or Caps Lock key		disable functionality of some or most keys,
doesn’t seem to work		depending on keyboard used.
• Some keys don’t work as	3.	The iMac has 4 USB ports on rear of computer.
expected		Make sure to try each port to isolate a particular
		port malfunction.
	4.	Test with a known-good wired keyboard to
		isolate a failed peripheral issue.
	5.	Test wired keyboard on a known-good, same-
		model computer. If it works on the other
		computer, this may indicate a bad USB port if
		keyboard doesn’t work at all on user’s computer,
		or a software issue if keyboard is working but not
		as expected on user’s computer.
	6.	Ensure that all software and firmware updates for
		this model have been installed to take advantage
		of any available bug fixes.

Deep Dive

Check		Result	Action	Code
1.	Verify if all keys on keyboard	Yes	Go to step 2.
	work.
		No	Go to Keyboard: Specific
			Keys Do Not Respond
			symptom flow.
2.	Verify if Caps Lock is working as	Yes	Go to step 3.
	expected.
		No	Go to Keyboard: Specific
			Keys Do Not Respond
			symptom flow
3.	Verify if media Eject key is	Yes	Go to step 4.
	working as expected. Note that
	to prevent accidentally ejecting
	media, Mac OS X adds a slight	No	Go to step 5.
	delay to the media Eject key
	before it takes effect.

2010-09-09 iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices  106