HP ProBook 450 G4 Notebook PC and HP ProBook 455 G4 Notebook PC - Maintenance and Service Guide

WLAN/Bluetooth combo card
The computer uses a card that provides both WLAN and Bluetooth functionality.
Description Spare part number
WLAN module for use in all models:
Realtek RTL8723BE-VB 802.11b/g/n 1x1 Wi-Fi + Bluetooth 4.0 combination WLAN adapter 843338-001
Intel Dual Band Wireless-AC 7265NV (non v-Pro) 802.11 ac 2×2 WiFi + Bluetooth 4.2 Combo Adapter 860883-001
WLAN module for use in HP ProBook 450 models:
Intel Dual Band Wireless-AC 3168 802.11ac, Dual Band, 1×1 Wi-Fi + Bluetooth 4.0 852511-001
Before removing the WLAN module, follow these steps:
1. Shut down 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. Place the computer in “Battery Safe mode” (Battery Safe mode on page 32).
3. Disconnect all external devices connected to the computer.
4. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
5. Remove the service door (see Service door on page 33).
Remove the WLAN module:
1. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
NOTE: The WLAN antenna cable labeled “1” connects to the WLAN module “Main” terminal labeled “1”.
The WLAN antenna cable labeled “2” connects to the WLAN module “Aux” terminal labeled “2”. If the
computer is equipped with an 802.11a/b/g/n WLAN module, the yellow WLAN antenna cable connects to
the middle terminal on the WLAN module.
2. Remove the Phillips PM2.0×4.0 screw (2) that secures the WLAN module to the computer. (The edge of
the module opposite the slot rises away from the computer.)
40 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts