Have lost all t.v. channels in bedroom of r.v. and can't get them back for some reason...2006 raptor fifth wheel toy hauler...been here for over a year with no problems then just out of the blue while watching t.v. all channels lost signal and have tried reprogramming and now lost all channels saved on channel list and will not program any at all except 1 channel of Spanish speaking channel...thats it...how to troubleshoot or fix this please...