HP DV4-2153 Maintenance And Service Manual page 72

CAUTION:
CAUTION:
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.
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 hard drive bay cover (see
Remove the WLAN module:
1. Disconnect the wireless antenna wires (1) from the from the wireless module.
2. Remove the 2 Phillips PM2.0×4.0 screws (2) securing the WLAN module to the computer.
3. Remove the WLAN module (3) by pulling it away from the slot at an angle. (The edge of the module
opposite the slot rises away from the computer.)
NOTE:
module slot.
Reverse this procedure to install a WLAN module.
64 Chapter 4 Removal and replacement procedures
The WWAN module and the WLAN module are not interchangeable.
To prevent an unresponsive system, replace the wireless module only with a wireless
Battery on page
WLAN modules are designed with a notch (4) to prevent incorrect insertion into the WLAN
55).
Hard drive on page 59)