HP EliteBook 845 Maintenance And Service Manual page 49

2. Remove the bottom cover (see
3. Disconnect the battery cable from the system board (see
Remove the WWAN module:
1. Carefully disconnect the WWAN antenna cables (1) from the WWAN module.
NOTE: Computer models have two WWAN antennas. The #5 red WWAN antenna cable connects to the
WWAN module #5 Main terminal. The #6 blue WWAN antenna cable connects to the WWAN module #6 Aux
terminal.
2. Remove the Phillips M2.0 × 2.5 screw (2) that secures the WWAN module to the system board.
3. Remove the WWAN module (3) by pulling it away from the socket at an angle.
If a 4G WWAN module is installed in the computer, a plastic spacer (4) must be installed between the system
board and the WWAN module to ensure a correct installation.
4. Remove the Phillips M2.0 × 2.5 screw (2) that secures the WWAN module to the system board.
5. Thoroughly clean the thermal material from the surfaces of the WWAN module and the system board
each time the WWAN module is removed. The thermal pad is available in the Miscellaneous Kit, spare part
number N15290-001. The following illustration shows the replacement thermal material locations.
A thermal pad is used on the bottom of the WWAN module (1) and the system board area (2) that services
it.
Bottom cover on page 39).
Battery on page 41).
WWAN module 43