HP ZE4900 - Manual (Page 119)

5–36 Maintenance and Service Guide
Removal and Replacement Procedures
2. Disconnect the wireless button board cable 1 from the
system board.
3. Remove the 2 PM2.0×4.0 screws 2 that secure the wireless
button board to the notebook.
4. Remove the wireless button board 3.
Removing the Wireless Button Board
Reverse the above procedure to install the wireless button board.