Apple wired USB keyboard or mouse does not function with user’s computer, or shows one or more of the following symptoms:
Mouse button(s) does not click
Mouse scroll ball does not operate smoothly
Visually inspect the user’s USB mouse or keyboard to verify that the attached USB cable and/or connector is not damaged or frayed.
Check the user’s keyboard or mouse for physical and/or liquid damage.
On mice, verify that all mouse buttons click and the laser tracking LED illuminates.
On keyboards, verify that all keyboard buttons are present and can be depressed normally.