WLAN module
Table 5-6 WLAN module descriptions and part numbers
Description Spare part number
Dual antenna
Realtek RTL8822BE 802.11ac 2 × 2 Wi-Fi + BT 4.2 Combo Adapter (MU-MIMO supported) 924813-855
Single antenna
Realtek RTL8821CE 802.11ac 1 × 1 Wi-Fi + BT 4.2 Combo Adapter (MU-MIMO supported) L17365-005
Realtek RTL8723DE 802.11bgn 1 × 1 Wi-Fi + BT 4.2 Combo Adapter L21480-005
CAUTION: To prevent an unresponsive system, replace the wireless module only with a wireless module
authorized for use in the computer 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 support.
Before removing the WLAN module, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 31).
2. Remove the rubber feet (see Computer feet on page 31).
3. Remove the bottom cover (see Bottom cover on page 33).
4. Remove the battery (see Battery on page 35).
To remove the WLAN module:
1. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
NOTE: The #1 WLAN antenna cable is connected to the WLAN module Main terminal. The #2 WLAN
antenna cable is connected to the WLAN module Aux terminal.
2. Remove the Phillips M2.0 × 3.0 screw (2) that secures the WLAN module to the system board. (The WLAN
module tilts up.)
40 Chapter 5 Removal and replacement procedures for authorized service provider parts
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