Just finally got a chance to sit down and turn on the tube and have the signal loss error. We HAVE gotten snow here today and I'm hoping once we can get up there to knock it off it will help but in the meantime I did a switch test and it said "one of the switches is not connected correctly" - I then looked at details and it says port 4 is not connected. Any help? Backround - new roof this week, mounted to retrodeck and a tech came on Wed. to realign, everything seemed to be working fine til now.