HP ProBook 640 G1, 645 G1, 650 G1, and 655 G1 Notebook PCs - Maintenance and Service Guide

WLAN module
Description Spare part number
Qualcomm Atheros AR9485 802.11b/g/n 1×1 WiFi Adapter 675794-001
Intel Dual Band Wireless-AC 7265 802.11 ac 2×2 WiFi + BT 4.0 Combo Adapter for use only in Brazil 712639-201
Intel 802.11 2×2 a/b/g/n Combo Adapter 695915-001
Intel 802.11 2×2 a/b/g/n Combo Adapter 670292-001
Atheros 802.11 b/g/n 1×1 Combo Adapter 690019-001
Intel 802.11 2×2 AC + Bluetooth 4.0 717381-001
Intel 802.11 a/b/g/n 2×2 + Bluetooth 4.0 WLAN 710661-001
Broadcom 802.11 a/b/g/n 2×2 + BT 4.0 LE PCIe+USB HMC WW 730668-001
Intel 802.11 a/b/g/n 2×2 + BT 4.0 WLAN 747832-001
CAUTION: To prevent an unresponsive system, replace the wireless module only with a wireless module
authorized for use on 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 technical support.
Before removing the WLAN module, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see Battery on page 56).
5. Remove the service cover (see Service cover on page 57).
Remove the WLAN module:
1. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
NOTE: The WLAN antenna cable labeled “1” connects to the WLAN module “Main” terminal labeled
“1”. The WLAN antenna cable labeled “2” connects to the WLAN module “Aux” terminal labeled “2”.
2. Remove the two Phillips screws (2) that secure the WLAN module to the system board.
3. Remove the WLAN module bracket (3). (The WLAN module tilts up.)
Component replacement procedures 67