When TV went digital I could not get reception in the bedroom either still don't.
Someone here on the forum stated (in 'my' simple layman terms).....
that digital doesn't like going thru multiple connections or something like that. He had a solution for it for an RV feed back to the bedroom that would work with digital.
I have now bought several flat screen TV's and they are NOT equal when it comes to accepting signal strength. I fought and figured it was my antenna trying to get channels while on the road, only to find it varies GREATLY from TV to TV manufacturer.
Right now I have a real small Vizio that gets ALL the channels and the real big flat screen that is a Slyvania gets squat. All when parked in the same spot. :R