HP ProBook 450 G2, Руководство по техническому обслуживанию и ремонту, Страница: 59 / 169

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 lt4112 LTE/HSPA+ Gobi 4G Module 740011-001
HP hs3110 HSPA+ Mobile Broadband Module 748599-001
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 36 ).
5. Remove both service doors (see Service door on page 37 ).
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.)
Component replacement procedures 47