The Microsoft Basic Mouse v2.0 was introduced in 1993 and came in either a PS/2 port or Serial port configuration. They use a trackball on the bottom for movement and click and drag instead of a scroll wheel.
What you need
This teardown is not a repair guide. To repair your Microsoft Basic Mouse v2.0, use our service manual.
On the bottom of the mouse, twist the circular cap with the track ball in it in the direction of the arrows (clockwise) until you can't turn it anymore and flip the mouse back over to let the cap and ball fall out.
Carefully insert another, small spudger into the hole where the trackball and cap came out of and pry the clip up and unlatch the top shell from the bottom shell.
With the spudgers still inserted on either side of the mouse and the clips undone of the sides, take one more plastic spudger and pry from the top of the mouse where the cable comes out of.
The mouse should come apart with some force, but be careful not to snap any of the clips.
