HP ProBook 455, Maintenance And Service Manual

Page: 56 / 130

WLAN module
Description Spare part number
Atheros AR9485 802.11b/g/n 1x1 WiFi Adapter 675794-001
Atheros 9485GN 802.11b/g/n 1x1 WiFi and 3012 Bluetooth 4.0 Combo Adapter 655795-001
Broadcom 4313GN 802.11b/g/n 1x1 WiFi and 20702 Bluetooth 4.0 Combo Adapter 657325-001
Ralink WLAN Ralink Ripple3 RT5390F_802.11 b/g/n 1x1 PCIe HMC 670691-001
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 device functionality, and then contact 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 Battery on page 40 ).
To remove the WLAN module:
1. Loosen the memory module/wireless module compartment cover screw (1) , and then lift up on
the tab (2) and remove the cover (3) . The memory module/wireless module compartment cover
is available in the Plastics Kit. For more information about the Plastics Kit, see Plastics Kit
on page 27 .
2. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
NOTE: The #1 WLAN antenna cable is connected to the WLAN module Main terminal. The #2
WLAN antenna cable is connected to the WLAN module Aux terminal.
48 Chapter 4 Removal and replacement procedures