If a mouse fails to operate or should it perform irrationally, it may need a ball replacement. Mouse balls are now available as FRU (Field Replacement Unit). Because of the delicate nature of this procedure, replacement of mouse balls should only be attempted by properly trained personnel.
Before proceeding, determine the type of mouse balls by examining the underside of the mouse. Domestic balls will be larger and harder than foreign balls. Ball removal procedures differ depending upon the manufacture of the mouse.
Foreign balls can be replaced using the pop-off method.
Domestic balls are replaced by using the twist-off method.
Mouse balls are not usually static-sensitive. However, excessive handling can result in sudden discharge. Upon completion of ball replacement, the mouse may be used immediately. It is recommended that each person have a pair of spare balls for maintaining optimum user satisfaction.
Quentin(Have a 'ball less' mouse so no sticky situations for me)