HP EliteBook 8540p Maintenance And Service Manual page 78

Remove the WLAN module:
1. Turn the computer right-side up, with the front toward you.
2. 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. If the
computer is equipped with an 802.11a/b/g/n WLAN module, the yellow WLAN antenna cable is
connected to the middle terminal on the WLAN module.
3. Remove the two Phillips PM2.0×3.0 barrel screws (2) that secure the WLAN module to the
computer. (The edge of the module opposite the slot rises away from the computer.)
4. 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.
Reverse this procedure to install the WLAN module.
Component replacement procedures 71