Apple MD094LL/A manual Go to USB Device Not, Not Function Properly, See kBase #HT1537 How to

Deep Dive

Check		Result	Action	Code
1.	Verify if computer recognizes	Yes	Test device in all USB ports to
	keyboard or mouse when		ensure all other USB ports are
	plugged into rear USB ports on		working as expected.	M15
	back of iMac.		Replace logic board if any
			USB port on rear fails.
			Replace keyboard if any USB	K11
			port on keyboard fails.
			Go to step 2.
		No	Go to USB Device Not
			Recognized symptom flow.
2.	Verify if keyboard is working as	Yes	Go to step 3.
	expected.
		No	Go to Wired Keyboard Does
			Not Function Properly
			symptom flow.
3.	Verify if Mighty Mouse has an	Yes	See kBase #HT1537: How to
	issue with scroll ball.		clean your Mighty Mouse.
		No	Go to step 4.
4.	Verify if mouse has an issue	Yes	Go to step 7.
	with buttons.
		No	Go to step 5.
5.	Verify if mouse has an issue	Yes	Go to step 6.
	with tracking.
		No	Go to step 7.
6.	Try using mouse on another	Yes	Surface issue. Issue resolved.
	surface. Non-reflective, opaque
	surfaces without repetitive
	patterns work best. The surface
		No	Go to step 7
	should be clean but not shiny.
	Verify if mouse tracks correctly
	when used on another surface.
7.	See kBase #HT1581:	Yes	Issue resolved.
	Troubleshooting Mighty
	Mouse and determining
		No	Replace wired Mighty Mouse.	K99
	expected behavior. Verify if
	this article resolves issue.

2010-09-09 iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices  109