So 2.5 years into my Fuzion 420 the booster switch did go bad. We were in Charleston, Spring of 2018, for family reunion over Easter. Here are pics of rig side showing the two cable ports which was in the cabinet over master bed. The second pic showes all the pigtails mentioned in earlier posts. Seems the wiring in the switch crapped out. Ordered a new one on the road and had delivered to next keystone dealer in Myrtle Beach. Installed it and problem solved.
There was a lot of wire stuffed into the slot the switch came out of. Including a splitter (my rig has 4 tv’s). Got it all back into the hole and it has worked ever since.