Dell Inspiron 15R (N5110, Early 2011) - Manual (Page 32)

32 Palm-Rest Assembly
4 Turn the computer over and open the display as far as possible.
5 Remove the keyboard (see "Removing the Keyboard" on page 27).
6 Remove the four screws on the palm-rest assembly.
CAUTION: Pull on the plastic tab on top of the connectors to avoid damaging the
connectors.
7 Disconnect the power-button board cable, touch-pad cable, and hot-key
board cable from the connectors on the system board.