HP Pavilion dm4, Maintenance And Service Manual, Page: 64 / 135

4. Remove the WLAN module (3) by pulling it away from the slot at an angle.
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.
NOTE: WLAN modules are designed with a notch (4) to prevent incorrect insertion into the
WLAN module slot.
Reverse this procedure to install a WLAN module.
54 Chapter 4 Removal and replacement procedures