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WWAN module
NOTE: Not supported by computers with Linux installed.
Description Spare part number
HP un2400 Mobile Broadband Module (select models only) 483377-002
WWAN module for use only in the People's Republic of China 571888-001
CAUTION: The WWAN module and the WLAN module are not interchangeable.
To prevent an unresponsive system, replace the wireless module only with a wireless module authorized
for use in the device by the governmental agency that regulates wireless devices in your country or
region. If you replace the module and then receive a warning message, remove the module to restore
device functionality, and then contact technical support.
Before removing the WWAN module, follow these steps:
1. Shut down the device. If you are unsure whether the device is off or in Hibernation, turn the device
on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the device.
3. Disconnect the power from the device by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the device.
4. Remove the battery (see
Battery on page 32).
5. Remove the SIM (see
SIM on page 33).
6. Remove the following components:
a. Keyboard (see
Keyboard on page 36)
b. Hard drive (see
Hard drive on page 39)
c. Top cover (see
Top cover on page 44)
Remove the WWAN module:
1. Disconnect the wireless 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 2 Phillips PM2.0×4.0 screws (2) that secure the WWAN module (3) to the system
board. (The module tilts up.)
48 Chapter 4 Removal and replacement procedures