Dell Latitude 7280 Owner's Manual page 28

NOTE: Un-route the speaker cable from the routing clips from the touchpad buttons.
6. To remove the touchpad buttons board:
a. Disconnect the touchpad buttons board cable from the touchpad board [1].
NOTE: The touchpad buttons board cable is below the smart card cable. Ensure to lift the latch, to release the
touchpad button board cable.
b. Remove M2.0 x 2.5 screws (2) that secure the touchpad buttons board [2].
NOTE: To identify the screws, see
c. Lift the touchpad buttons board from the computer [3].
28 Disassembly and reassembly
screw list