HP COMPAQ NC2400 Maintenance And Service Manual page 112

Removal and Replacement Procedures
7. Remove the Mini Card WLAN module by lifting the left edge
of the module 1 until it rests at an angle, and then pulling the
module 2 away from the socket at an angle.
✎
Mini Card modules are designed with a notch 3 to prevent
incorrect installation into the Mini Card socket.
Removing a Mini Card WLAN Module
Reverse the above procedure to install a Mini Card WLAN
module.
5–20 Maintenance and Service Guide