HP ProBook 4320s Notebook PC HP ProBook 4321s ... - Warranty Life

7. Following the sequence stamped into the heat sink, loosen the four PM2.5×10.0 captive screws(1) that secure the heat sink to the processor.NOTE: Loosen the two additional screws that secure the heat sink to the graphics devices onmodels with discrete graphics subsystem memory.8. Lift the heat sink off the processor (2), and then lift the heat sink up and to the right to removethe heat sink from the base enclosure (3).NOTE: The thermal material must be thoroughly cleaned from the surfaces heat sink for thediscrete system board (1), (2), and (3), and the system board (4), (5), and (6) each time the heat sinkis removed. Replacement thermal material is included with all heat sink, system board, and processorspare part kits.78 Chapter 4 Removal and replacement procedures