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WWAN module
CAUTION: The WWAN module and the WLAN module are not interchangeable.
NOTE: M.2 SSD and WWAN devices share the same connector; therefore, you cannot install both
devices at the same time.
Description Spare part number
HP lt4112 LTE/HSPA+ Gobi 4G Module 704031-001
HP hs3110 HSPA+ Mobile Broadband Module 723895-001
Before removing the WWAN module, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off 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 first unplugging the power cord from the AC outlet,
and then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 35).
5. Remove the service door (see
Service door on page 43).
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 two 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.)
46 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts