HP ProBook 450 G5 Maintenance And Service Manual page 81

3. Lift the heat sink from the system board (2).
NOTE: Thoroughly clean thermal material from the surfaces of the heat sink (1)(3) and the system
board components (2)(4) each time you remove the heat sink. All heat sink and processor spare part kits
include thermal material.
4. UMA models: In the order indicated on the heat sink, loosen the 4 captive Phillips screws (1) that secure
the heat sink to the system board.
Component replacement procedures 71