HP 15 Maintenance And Service Manual page 74

4. Remove the heat sink assembly (2).
Thoroughly clean the thermal connections (1) on the system board and the heat sink (2) before
replacing a heat sink onto a system board.
NOTE:
model equipped with a graphics subsystem with UMA memory. Thermal paste is used on
the processor (1) and the fan/heat sink assembly section (2) that services it.
5. Reverse this procedure to install the fan/heat sink assembly. Replace the thermal material that ships
with the replacement heat sink.
64 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
The following illustration shows the replacement thermal material locations on a computer