HP ProBook 4430s, 4431s, 4330s and 4331s Notebook PCs - Maintenance and Service Guide

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.
74 Chapter 4 Removal and replacement procedures