IBM Memo about Peripheral Replacement
This is an actual alert to IBM Field Engineers that went out to all
IBM Branch Offices. The person who wrote it was very serious. The rest
of us may find it rather funny.
Abstract: Mouse Balls Available as FRU (Field Replacement Unit) Mouse
balls are now available as FRU. 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
manufacturer of the mouse. Foreign balls can be replaced using the
pop-off method. Domestic balls are replaced 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 maybe used immediately.
It is recommended that each replacer have a pair of spare balls for
maintaining optimum customer satisfaction, and that any customer
missing his balls should suspect local personnel of removing these