Soldato
Unfortunately no-one repairs them as far as I’m aware. They check the serial number, bin them and send you a new one. Depending on the value they often don’t even ask for them back. If it was pan or tilt that had failed I’d say look for a slipped belt but if it’s both it probably is the controller, as you’ve already worked out. Have you tried reflashing the firmware? Sometimes a hard reset and a firmware update revives them (although that’s usually on dead Dahuas).
I did update the firmware, haven’t tried any kind of reset, they don’t have a physical reset button anywhere.
Looks like we either use it as a fixed camera or buy a new one. It’s annoying that it hasn’t even lasted 3 years.