HP Pavilion dm4 Maintenance And Service Manual page 58

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
5. Remove the memory/wireless module compartment cover (see
Remove the WLAN module:
1. Turn the computer upside down with the front toward you.
2. Disconnect the two WLAN antenna cables (1) from the WLAN module.
3. Remove the two Phillips PM2.0×4.0 screws (2) that secure the WLAN module to the computer.
(The edge of the module opposite the slot rises away from the computer.)
4. Remove the WLAN module (3) by pulling it away from the slot at an angle.
CAUTION:
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.
NOTE:
WLAN module slot.
50 Chapter 4 Removal and replacement procedures
Battery on page
To prevent an unresponsive system, replace the wireless module only with a
WLAN modules are designed with a notch (4) to prevent incorrect insertion into the
42).
Memory module on page 44).