Dell XPS L702X Service Manual page 116

11 Follow the instructions from step 9 to step 14 in "Removing the Top
Cover" on page 83.
12 Disconnect the speaker cable from the connector on the I/O board.
1 speaker cable connector
13 Turn the top-cover assembly over.
14 Remove the three screws that secure the I/O board to the top cover.
15 Carefully ease the connectors on the I/O board out of the slots in the top
cover, and lift the I/O board off the top cover.
116
I/O Board
1