Can you locate the controller? My 2016 Miramar is in the overhead cabinet above the driver's seat. Does it indicate (light up) power is present? If not, probably blown fuse. There are input (12 volt) terminals on the control board, check there for power. Fuse location is unknown to me. Of course make sure ignition is off, bunk lock key is in on position and locking pins are removed. Lippert web site has info on the flashing self diagnosis led on my controller, maybe yours too.
1998 Min Winnie, 2000 Winbago Journey, 2015 ACE 29.3
2016 Thor Miramar 34.2