Pull the CD-ROM drive tray partly out.

Remove the silver Phillips screw from the plastic casing.

Turn the computer over.

Remove the three Phillips screws.

This is a diagram of the trackpad ribbon clamp connector you will disconnect in the next step.

1) With your fingernails, grasp the locking bar on either side and pull up a small amount (about 1/16" or 2 mm).

2) After disengaging the locking bar, slide the cable out of the connector.