Dell Precision M40 - Manual (Page 9)

3. Pivot the Mini PCI Card assembly down until it clicks into place.
4. Replace the Mini PCI Card assembly cover.
Keyboard Assembly
Keyboard Screws
Removing the Keyboard Assembly
1. Follow the instructions in " Preparing to Work Inside the Computer ."
2. Turn the computer over and remove the four screws labeled with a "circle K."
3. Turn the computer over and open the display.
4. Use a nonmarring tool under the blank key to pry up the keyboard.
NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries.
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
NOTICE: Be careful when handling the keyboard. The keycaps are fragile, easily dislodged, and time-consuming to replace.