System information

Removal and replacement procedures
Maintenance and Service Guide 4–19
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 computer 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 4-7).
5. Remove the hard drive (see “Hard drive” on page 4-15).
Remove the WLAN module:
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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 computer functionality, and then contact technical support through
Help and Support.
1. Disconnect the WLAN antenna cables 1 from the WLAN module.
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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 Phillips PM2.0×3.0 screw 2 that secures the WLAN module to the computer.
3. Remove the WLAN module 3 by pulling it away from the slot at an angle.
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WLAN modules are designed with a notch 4 to prevent incorrect insertion into the WLAN module slot.
Reverse this procedure to install the WLAN module.