HP EliteBook 820 G2 Notebook PC and HP EliteBook 720 G2 Notebook PC - Maintenance and Service Guide

WWAN module
Description Spare part number
HP hs3110 HSPA+ Mobile Broadband Module 822828-001
HP lt4112 LTE/HPSA+ Mobile Broadband Module 790198-001
HP lt4111 LTE/EV-DO/HSPA+ Mobile Broadband Module 793116-001
Before removing the WWAN module, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the service cover (see Service cover on page 37).
5. Remove the battery (see Battery on page 39).
Remove the WWAN module:
1. Disconnect the WWAN antenna cables (1) from the terminals on the WWAN module.
NOTE: The WWAN antenna cable labeled “5” connects to the WWAN module “Main” terminal labeled
“5”. The WWAN antenna cable labeled “6” connects to the WWAN module “Aux/GPS” terminal labeled
“6”.
2. Remove the Phillips PM2.0×2.5 screw (2) that secures the WWAN module to the system board. (The
WWAN module tilts up.)
3. Remove the WWAN module (3) by pulling the module away from the slot at an angle.
NOTE: If the WWAN antenna cables are not connected to the terminals on the WWAN module, protective
sleeves should be installed on the antenna connectors, as shown in the following illustration.
44 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts