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 WLAN 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 44).
5. If your device has WWAN capability, remove the SIM (see
SIM on page 45).
6. Remove the following components:
a. Keyboard (see
Keyboard on page 48)
b. Hard drive or solid-state drive (see
Mass storage devices on page 54)
c. Top cover (see
Top cover on page 57)
Remove the WLAN module:
1. Remove the 2 Phillips PM2.0×4.0 screws (1) that secure the WLAN module to the system board.
(The edge of the module opposite the slot rises away from the device.)
2. Disconnect the wireless antenna cables (2) from the terminals on the WLAN module.
3. Remove the WLAN module (3) by pulling the module away from the slot at an angle.
Reverse this procedure to install the WLAN module.
Component replacement procedures 61
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