HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide

4.
Release the ZIF connectors (1) and (3) to which the TouchPad and fingerprint cables are
connected, and then disconnect the cables (2) and (4) from the system board.
NOTE: Only select models are equipped with fingerprint readers.
5. Remove the palm rest.
Reverse this procedure to install the palm rest.
86 Chapter 4 Removal and replacement procedures