HP ProBook 4430s Maintenance And Service Manual page 79

2.
Remove the following covers and screws that secure the top cover to the computer:
(1): 4 rubber screw covers
(2): 10 Torx PM2.5×6.0 screws
3.
Remove the following screws that secure the top cover to the computer:
(1): 3 Phillips PM2.0×3.0 screws from the optical drive bay and left side of the battery bay
(2): 2 Phillips PM2.5×2.5 broadhead screws from the battery bay
4. Position the computer upright with the front toward you.
Component replacement procedures
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