HP TC4400 - Manual (Page 116)

Removal and Replacement Procedures
Maintenance and Service Guide 5–33
4. Make note of which antenna cable is attached to which
antenna clip on the Mini Card WLAN module, then
disconnect the auxiliary and main antenna cables 1 from
the Mini Card WLAN module.
5. Remove the two Phillips PM2.0×5.0 screws 2 that secure the
Mini Card WLAN module to the computer. (The edge of
the Mini Card WLAN module opposite the socket rises away
from the computer.)
6. Remove the Mini Card WLAN module by pulling the module
away from the socket at an angle 3.
✎
The Mini Card WLAN modules are designed with a notch 4 to
prevent incorrect installation.
Removing a Mini Card WLAN Module
Reverse the above procedure to install a Mini Card WLAN
module.