4–18 Maintenance and Service Guide
Removal and replacement procedures
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 three WLAN antenna cables 1 from the WLAN module.
2. Remove the Phillips PM2.0×3.0 screw 2 that secures the WLAN module to the computer. (The edge of the
module opposite the slot rises away from 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.
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When attaching the WLAN antenna cables to the module make sure that the cable tag numbers are matched to
the numbers on the module. Cable 1 should be attached to TR1, cable 2 to TR2, and cable 3 to TR3.
Switch cover and keyboard
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Before removing the switch cover and keyboard, 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.
Description: Spare part number
Switch cover for use in white computers (includes LED board and cable) 571747-001
Switch cover for use in black computers (includes LED board and cable) 571757-001
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For a detailed list of available keyboards for your country or region, see pages 3-3 through 3-5.
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