HP ProBook 4525s Notebook PC - Maintenance and Service Guide

4. Remove the battery (see Battery on page 48).
5. Remove the following components:
a. Switch cover and keyboard (see
Switch cover and keyboard on page 49).
NOTE: It is not necessary to disconnect the keyboard to remove or install the heat sink.
b. Thermal shield (see Thermal shield on page 59).
Remove the heat sink:
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For computers with discrete subsystem memory on the system board, follow these steps:
1. Position the computer right-side up with the front toward you.
2. Following the sequence stamped into the heat sink, loosen the six captive screws (1), (2), (3),
(4), (5), (6), around the processor.
3. Disconnect the fan cable from the system board (7), and then remove the heat sink (8).
64 Chapter 4 Removal and replacement procedures