HP EliteBook 840 G2 Notebook PC Maintenance And Service Manual page 106

12. Release the wireless antenna cables (7) from the routing clips and channels built into the top cover.
13. Remove the three Phillips PM2.5×5.0 screws that secure the system board to the top cover.
14. Lift the left side of the system board (1) until it rests at an angle.
96 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts ENWW