The AVX has no fewer than seven RJ-11 ports, which are used to connect everything on the mount except the power. Since the ports are identical, it is perilously easy to plug the wrong thing into the wrong port, especially when setting up in the dark. This can very easily result in the instantaneous destruction of the mount's motor control board, rendering the mount inert, useless except as a purely manual push-to mount.
I experienced this myself while conducting public astronomy outreach at a national park. I was unable to obtain a new board for a quick self-repair, so I was pushing my scope around by hand for the remainder of my stay at the park. After some whining and complaining on my part, Celestron agreed to repair the mount under warranty, a process which took months.
Be very careful not to fall into this booby trap. Double check all connections before powering the mount. One little mistake is all it takes.