You cannot run the hotspot and the LAN at the same time. This is a know issue with this series of mixer. You have to disable the hotspot and WiFi and only run LAN to a router or switch which you have done. These mixers were supposed to have firmware updates that enabled the hdmi to output the GUI you see on your tablet or mixer. You could hookup a hdmi touch screen or a traditional mouse and keyboard to control it right from the box. Sadly I think there were hardware or software limitions with their designs so the updates never came. The UI24r has this capability though. Just not the UI16/12. The 24r does have the same issues with the hotspot / LAN.