HP ProBook 4525s Notebook PC - Maintenance and Service Guide

4. Clean the thermal material from the surfaces of the heat sink components (1), (3), and (5) and
from the system board (2), (4), and (6) when the heat sink is removed. Replacement thermal
material is included with all heat sink, system board, and processor spare part kits.
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For computers with UMA 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 screws (1), (2), (3), (4), (5),
and (6) around the processor.
Component replacement procedures 65