Lift the latch and disconnect the optical-drive cable from the system board. See first picture with blue circle.

Remove 15 screws that secure the computer base to the palm-rest assembly.

Close the display and turn the computer over. Disconnect the speaker cable which is next to RAM chip from the system board. See second picture with blue circle. Remove the antenna cables from the routing guides on the computer base.

Using your fingertips, starting from the rear, pry the computer base off the palm-rest assembly. Ensure the antenna cables from wireless card are completely removed from the routing guides on the computer base.

Turn the computer base over. Remove the optical-drive interposer.