HP EliteBook 820 G1 Maintenance And Service Manual page 107

9.
Remove the following screws that secure the top cover to the base enclosure:
(1) One Phillips PM2.0×6.5 screw
(2) Three Phillips PM2.5×4.5 screws
(3) Two Phillips PM2.0×3.0 screws
10. Remove the two Phillips PM2.5×4.5 screws (1) that secure the top cover to the base enclosure.
11. Remove the top cover (2).
Reverse this procedure to install the top cover.
ENWW
Component replacement procedures
97