Starting at the corner at which the power and Ethernet ports are located, pry open the outer shell using a spudger and continue around the entire unit.
Note: You may use your hands for additional force to separate the two pieces of the outer shell.
Locate the clock battery at the front, right section of the unit. The battery has a circular shape with red (+) and black (-) wires connecting to the motherboard.
Gently detach the ribbon cable connecting the IR sensor to the motherboard.
Caution: Always remove ribbon cables by the plastic handles located on either end. Gripping a ribbon cable anywhere but the provided handles can damage the cable and render the component useless.
Locate the optical drive which occupies most of the space on the right side of the unit. It can be identified by the four screws with wide-diameter heads fastening the optical drive to the motherboard.
Gently detach the ribbon cables from the motherboard using a pair of tweezers.
Note: The ribbon cable in the center must be unlocked by lifting up the black tab. Remember to push the tab down upon re-installation to secure the cable.
Caution: Always remove ribbon cables by the plastic handles located on each end. Gripping a ribbon cable anywhere but the provided handles can damage the cable and render the component useless.