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

4. Clean the thermal material from the surfaces of the heat sink components (1) and the system
board (2) each time the heat sink is removed. Replacement thermal material is included with all
heat sink, system board, and processor spare part kits.
Reverse this procedure to install the heat sink and fan.
Processor
NOTE: The processor spare part kit includes replacement thermal material.
Description Spare part number
i3-330M, 2.13-GHz 597622-001
i3-350M, 2.26-GHz 597623-001
i5-430M, 2.26-GHz 597624-001
i5-520M, 2.4-GHz 594187-001
i5-540M, 2.53-GHz 594188-001
i7-620M, 2.26-GHz 587259-001
74 Chapter 4 Removal and replacement procedures