Dell Latitude 5420 Rugged Service Manual page 135

7. Peel off the tape [1] and disconnect the left I/O board FPC connector [2] from the system board.
8. Peel off the tape [1] and disconnect the power button cable [2].
9. Peel off the tape [3] to disconnect the USH board and touch pad cable [4] from the system board.
Removing and installing components 135