Has the bedroom TV ever worked or is this a new or new to you rig?
First thing I would try before chasing cables in the walls is eliminate the possibility of the TV being the problem. Hook up the living room TV (known good) to the connection in the bedroom. Then hook up the bedroom TV the living room connection (also known good).
If bedroom TV works in the living room, and the living room TV doesn't work in the bedroom, you know it's the cable.
See what happens and let us know.
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John (USAF Ret) & Cheryl
San Antonio, TX
2014 Hill Country 32FR
2011 Ram 2500 4x4 6.7 CTD
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