I had trouble with the King also and am still not really happy. With that said first off is your boost button pushed in? You do not need an additional boost as long as the one provided is on. Behind the wall plate where the cable connects I would make sure everything is more than finger tight. I found my connections were very loose. I would also buy a "gold" spliter and change out the one that came with your unit. The splitter should be somewhere close to the wall plate.
Retired and never looked back