This memo is from an unnamed computer company.
It went to all field engineers about a computer
peripheral problem. The author of this memo was
quite serious. The engineers rolled on the floor.
Mouse balls are now available as FRU (Field
Replacement Unit) therefore, if a mouse fails
to operate or should it perform erratically, it
may need a ball replacement. 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 manufacturer of the mouse. Foreign balls
can be replaced using the pop off method.
Domestic balls are replaced by using the
Mouse balls are not usually static sensitive.
However, excessive handling can result in
Upon completion of ball replacement, the mouse
may be used immediately. It is recommended that
each replacer have a pair of spare balls for
maintaining optimum customer satisfaction. Any
customer missing his balls should suspect local
personnel of removing these necessary items.