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WWAN module
Description Spare part number
HP un2400 Mobile Broadband Module 483377-002
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 through Help and 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 37).
5. Remove the following components:
a. Keyboard (see
Keyboard on page 40)
b. Hard drive or solid-state drive (see
Mass storage devices on page 42)
c. Top cover (see
Top cover on page 45)
50 Chapter 4 Removal and replacement procedures