Our new Bailey Unicorn has an external plug for a coaxial lead which connects the television signal from a point on the pitch bollard to the caravan. When connected to the caravan the television shows “no signal”. I have used a signal detector which shows a strong signal at the caravan end of the coaxial cable. I’ve also checked the lead connecting the television to the internal plug. The television is fine if connected directly to the bollard, bypassing the internal system. Is there a switch to change from roof aerial to bollard? Friends of ours with a new Coachman have the same problem!