Dell Inspiron 3420 Owner's Manual page 26

4 Remove the keyboard (see "Removing the Keyboard" on page 15).
5 Remove the three screws on the palm-rest assembly.
CAUTION:
connectors.
6 Lift the connector latch that secures the power-button board cable and
touch-pad cable to the connectors on the system board and remove the
cables.
26
Palm-Rest Assembly
Pull on the plastic tab on top of the connectors to avoid damaging the