My AP1600 worked flawlessly the night before but next day it got stuck on thinking its in the northern hemisphere so slews were going towards the ground!
I am using Sky X and Ascom driver for AP. It usually works without a hitch. Something got written wrong or erased perhaps. Power got interrupted a few times that day whilst I was processing images and had the mount on (taking day flats).
I am using the version of Sky X just before they start subscriptions.
Not sure if its a Software Bisque issue or if a driver issue in Sky X. I did a couple of star syncs to get it back on track (that worked before when it happened once or twice before) but it did not change anything.