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 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 computer functionality, and then contact technical support through Help and
Support.
Before removing the WLAN module, follow these steps:
1. Shut down 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 all external devices connected to the computer.
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 computer.
4. Remove the battery (see
Battery on page 38).
5. Remove the service cover (see
Service cover on page 40).
Remove the WLAN module:
1. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
NOTE: The black WLAN antenna cable is connected to the WLAN module “Main” terminal.
The white WLAN antenna cable is connected to the WLAN module “Aux” terminal.
2. Remove the two Phillips PM2.0×4.0 screws (2) that secure the WLAN module to the system
board. (The WLAN module tilts up.)
3. Remove the WLAN module (3) by pulling the module away from the slot at an angle.
NOTE: WLAN modules are designed with a notch (4) to prevent incorrect insertion of the
WLAN module into the WLAN module slot.
Reverse this procedure to install the WLAN module.
46 Chapter 4 Removal and replacement procedures
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