HP ProBook 4430s, 4431s, 4330s and 4331s Notebook PCs - Maintenance and Service Guide

5. Lift the heat sink up and out of the computer (5).
NOTE: For discrete models, thoroughly clean thermal material from the surfaces of the system
board components (1)(3) and the heat sink (2)(4) each time you remove the heat sink. All heat sink
and processor spare part kits include thermal material.
NOTE: For UMA models, thoroughly clean thermal material from the surface of the system board
(1) and heat sink (2) each time you remove the heat sink. All heat sink and processor spare part kits
include thermal material.
Reverse this procedure to install the heat sink.
70 Chapter 4 Removal and replacement procedures