HP Compaq Presario,Presario B1201 Maintenance And Service Manual page 86

Remove the heat sink (3) by lifting it straight up.
3.
NOTE: The thermal material must be thoroughly cleaned from the surfaces of the heat sink (1) and
(3), the processor (2), and graphics subsystem component (4) on the system board each time the heat
sink is removed. Thermal material is included with all system board, heat sink, and processor spare part
kits, and is also available in the Thermal Material Kit, spare part number 445853-001.
Reverse this procedure to install the heat sink.
78 Chapter 4 Removal and replacement procedures