HP EliteBook 755 G4 Notebook PC & HP EliteBook 745 G4 Notebook PC - Maintenance and Service Guide

WWAN module
The WLAN module and WWAN module are not interchangeable.
The WWAN module is available on select models only.
Description Spare part number
HP lt4120 LTE/EVDO/HSPA+ with GPS M.2 Mobile Broadband Module 800870-001
HP lt4132 LTE/HSPA + with GPS M.2 Mobile Broadband Module 845710-001
HP hs3210 WW HSPA+ Mobile Broadband Module (available in China, Japan, Taiwan, Indonesia, and
Ukraine with non-vPro WLAN only)
860726-001
Before removing the WWAN module, follow these steps:
1. Shut down 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 all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 35).
5. Remove the battery (see Battery on page 40).
Remove the WWAN module:
1. Position the computer upside-down.
2. Disconnect the WWAN antenna cables (1) from the terminals on the WWAN module.
NOTE: The red WWAN antenna cable is connected to the WWAN module “Main” terminal. The blue
WWAN antenna cable is connected to the WWAN module “Aux” terminal.
3. Remove the one Phillips PM2.5×3.0 screws (2) that secure the WWAN module to the computer. (The
edge of the module opposite the slot rises away from the computer.)
48 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts