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part numbers 641192-001 (for use only on HP EliteBook 8570p Notebook PC computer models)
and 646608-001 (for use only on HP ProBook 6570b Notebook PC computer models).
4. Remove the six Torx PM2.5×6.0 screws (4) that secure the base enclosure to the computer.
5.
Remove the following seven Phillips PM2.0×3.6 screws that secure the base enclosure to
the computer:
(1) Three screws in the optical drive bay
(2) Two screws in the battery bay
(3) Two screws in the hard drive bay
108 Chapter 4 Removal and replacement procedures