I have a 2016 Sunseeker and had the same issue. Two things must be done, one of which you did, ie, turn off the booster. Then go to menu on the TV and do the channel scan for CABLE. Be sure not to select "AIR".....it must be for CABLE. Then after a variable amount of time, the scan will find and store the cable channels. See your TV manual on how to set up "favorites" once all of the channels have been stored. That way you can easily select your desired channels via the "F-List" key on your remote.