Maintenance and Service Guide

WLAN module
Description Spare part number
Broadcom BCM4352 802.11ac 2×2 Wi-Fi + BT 4.0 Combo Adapter 724935-005
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 technical support.
Before removing the WLAN module, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off 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 23).
5. Remove the rear cover (see
Rear cover on page 26).
6. Disconnect the battery cable (see
Hard drive on page 27).
7. Remove the hard drive (see
Hard drive on page 27).
8. Remove the cover bracket (see
X-axis capacitor board on page 33).
9. Remove the display stand recess (see
Display stand recess on page 41).
Remove the WLAN module:
1. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
NOTE: The #1/black WLAN antenna cable is connected to the WLAN module Main terminal.
The #2/gray WLAN antenna cable is connected to the WLAN module Aux terminal.
2. Remove the Phillips PM2.0×3.5 screw (2) that secures the WLAN module to the system board.
(The WLAN module tilts up.)
Component replacement procedures 49