HP 540 - Notebook PC Maintenance And Service Manual page 52

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
Remove the WLAN module:
1. Position the computer with the front toward you.
2. Loosen the Phillips PM2.0×5.0 captive screw (1) that secures the WLAN module compartment
cover to the computer.
3. Lift the right side of the WLAN module compartment cover (2), swing it to left, and remove the
cover. The WLAN module compartment cover is included in the Plastics Kit, spare part number
456614-001.
4. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
NOTE:
white WLAN antenna cable is connected to the WLAN module "Aux" terminal.
5. Remove the two Phillips PM2.5×4.0 screws (2) that secure the WLAN module to the computer.
(The edge of the module opposite the slot rises away from the computer.)
42 Chapter 4 Removal and replacement procedures
Battery on page
The black WLAN antenna cable is connected to the WLAN module "Main" terminal. The
37).