Computer Mouse

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, but 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 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 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.