HP EliteBook 850 G6 Maintenance And Service Manual page 72

2. Remove the three Phillips M2.5 × 3.0 screws that secure the system board to the computer.
3. Close the computer and position it upside down.
4. Disconnect the following cables from the system board:
(1) Speaker cable
(2) Display cable
(3) Camera cable
(4) Power button board cable
(5) USB cable
(6) Smart card reader cable
(7) NFC module cable (select products only)
(8) RTC battery cable
(9) Fingerprint reader cable
62 Chapter 6 Removal and replacement procedures for authorized service provider parts