HP ProBook 640 G1, 645 G1, 650 G1, and 655 G1 Notebook PCs - Maintenance and Service Guide

Table Of Contents
2. Remove the heat sink assembly:
NOTE: Due to the adhesive quality of the thermal material located between the heat sink assembly
and the system board components, it may be necessary to move the heat sink assembly from side to
side to detach it.
For computer models equipped with Intel UMA graphics, following the 1 through 4 sequence
stamped into the processor heat sink, loosen the four Phillips captive screws that secure
the processor heat sink to the system board, and then remove the heat sink (2).
80 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts