2. Remove the memory module (2) by pulling it away from the slot at an angle.
Reverse this procedure to install a memory module.
WLAN module
Description Spare part number
Realtek RTL8723BE 802.11b/g/n 1×1 WiFi + Bluetooth 4.0 Combo Adapter 855106-855
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 technical support.
Before removing the WLAN module, follow these steps:
1. Turn o 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. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see Bottom cover on page 24).
5. Disconnect the battery cable from the system board (see Battery on page 26).
Remove the WLAN module:
1. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
Component replacement procedures 29