HP ProBook 440 G1 Maintenance And Service Manual page 68

4.
Remove the following screws:
(1) 2 Phillips PM2.0×3.0 screws from the optical drive bay
(2) 3 Phillips PM2.0×3.0 screws from the battery bay
(3) 2 remaining Torx T8M2.5×6.0 screws from the bottom of the computer
5.
Position the computer upright and open it as far as possible.
6. Remove the 7 Torx T8M2.5×6.0 screws from the top of the computer.
7.
Disconnect the following cables from the system board:
(1): Power button board cable
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(2): Speaker cable
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56 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts