This is the Kensington Expert Trackball Mouse. This ergonomic mouse, from the 1990s, features a roller ball, and 4 tactile buttons. Begin by removing the roller ball by flipping the mouse upside down.

Begin by peeling the sticker from the back of the mouse.

Remove the phillips screws.

Separate the top and bottom halves of the mouse.

The simple circuit board features many modular components, making repairs easy.