Are you in a new place, with a new service. I ask because last year we stopped into a campground and had the same exact thing happen. The living room worked but the bedroom didnt. The campground had comcast service and we were going to be there for a month. so we called comcast. They sent a tech He had to change two cables and add a spliter but it worked. It also took our satillite off the air, but we didnt have a signal so it didnt matter. If this sounds familiar I'll go on, we are in a campground where we have satillite signal so I had to switch it back and the satillite works but their cable now only works in the living room not the bedroom.
2014 31SL: 2014 F350 6.7 litre crew cab:
Steve & Gloria