Dell Latitude 3420 Service Manual page 51

Steps
1. Unroute the display cable from the routing guides in the palmrest assembly.
2. Peel the adhesive tape that secures the display cable in place.
3. Open the latch and disconnect the display cable from the connector on the system board.
4. Remove the three (M2.5x6) and two (M2.5x4) screws that secure the display hinges to the system.
5. Lift the left and right hinges in upward direction away from the palmrest assembly.
6. Lift the palmrest assembly off the display assembly.
Removing and installing components 51