HP ProBook 470 G1 Maintenance And Service Manual page 61

4. Remove the following screws:
(1) 2 Phillips PM2.0×3.0 screws from the optical drive bay
(2) 5 Phillips PM2.5×3.0 screws from the battery bay
5. Position the computer upright and open it as far as possible.
6. Remove the 4 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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Component replacement procedures 49