Dell Inspiron 15 (N5040, Mid 2011) - Manual (Page 58)

58 Display
4 Follow the instructions from step 3 to step 8 in "Removing the Palm-Rest
Assembly" on page 29.
5 Remove the hinge cover (see "Removing the Hinge Cover" on page 53).
6 Disconnect the display cable from the connector on the system board.