Dell Latitude 9440 2-in-1 Service Manual page 44

There are seven screws in two sizes securing the system board in
place.
11. Remove the system board off the chassis.
CAUTION: Do not hold and bend the system board from its "necks" as it may damage the system
board.
12. Peel back the display absorber and WWAN thermal pad (for systems shipped with WWAN) from the system board.
NOTE: All of the above mentioned absorbers/stickers on the system board are re-usable and must be immediately
relocated to the replacement system board.
44 Removing and installing components