HP EliteBook 840r G4 Maintenance And Service Manual page 72

RTC battery (see
●
● Heat sink/fan assembly (see
Remove the system board:
1. Disconnect the following cables from the system board:
(1) Speaker cable
(2) Display cable
(3) Webcam cable (select products only)
(4) USB/VGA board cable
(5) Smart card reader cable (from card reader)
2. Remove the 2 Phillips M2.5×5.0 screws (1) that secure the system board to the computer.
3. Lift the right side of the system board up at an angle (2).
62 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
RTC battery on page 47)
Heat sink/fan assembly on page 50)