HPE Edgeline EL300 Maintenance And Service Manual page 28

a. Disconnect the power cord from the power source.
b. Disconnect the power cord from the system.
3. Depending on the surface the system is installed on, do one of the following:
a. Dismount the system from wall.
b. Dismount the system from the rails.
4. Place the system on a flat, level surface.
5. Locate the correct antenna slot.
6. Remove the antenna holders.
7. Remove the antenna.
The antenna shown in the image might look different from the antenna for your system.
28 Removal and replacement procedures