HP Pro 4300 Maintenance And Service Manual page 73

11. Disconnect the antenna cables from the module (1).
12. Remove the Phillips screw (2) that secures the module to the computer.
Figure 6-55 Removing the WLAN module screw and antennas
13. Lift the module to a 45-degree angle, and then pull it away to remove it from the socket.
Figure 6-56 Removing the WLAN module
To install the WLAN module, reverse the removal procedures.
NOTE: WLAN modules are designed with a notch to prevent incorrect insertion.
WLAN Module 65