WWAN module
NOTE: The WWAN module and the WLAN module are not interchangeable.
Description Spare part number
HP lt4112 LTE/HSPA+ Gobi 4G Module 790198-005
HP hs3110 HSPA+ Mobile Broadband Module 822829-005
HP lt4211 LTE/EV-DO/HSPA+ Mobile Broadband Module 793116-005
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 hard drive cover (see Bottom cover on page 31).
5. Remove the bottom cover (see ForcePad (Touchpad) on page 49).
6. Disconnect the battery (see Battery on page 36).
Remove the WWAN module:
1. 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.
2. Remove the Phillips PM2.0×3.0 screw (2) that secures the WWAN module to the system board.
42 Chapter 5 Removal and replacement procedures for Authorized Service Provider parts
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