Remove four 3.7 mm screws from around edge of the motherboard.

Remove three 3.8 mm screws. One of these is near top left of Dell MCIA. The other is near top left of WWAN. There is one underneath the Black WWAN label.

Remove the PCMCIA connector from the motherboard.

Turn the laptop on the side and remove two female hex screws from the video card and two posts from the serial port using socket driver (3/16 socket).

All hex screws are 10.23mm x 2.66mm size.