you could run a new cable from the working one to the bed room, useing a splitter,  but i dont know your set up, but then you will have a problem with the new cable run, hidding it,  can you follow the none working tv  point  back  to the other end and see the problem,  i would try use a tv splitter from the working one  and drill through the wall, and put a new tv box on the bedroom wall, if the distance is short,
                 m
                
 January 2014