Many of the non-articulating TV mounts in RVs are a "V-notch" type mount and just lift up. There is usually a latch at the top of the mount that pivots on a screw - you just rotate it out of the way. Can you use a mirror and a flashlight to get a view back there?
Rob
U.S. Army retired
2020 Solitude 310GK-R
MORryde IS, disc brakes, solar, DP windows
(Previously in a Reflection 337RLS)
2012 F350 CC DRW Lariat 6.7
Full-time since 8/2015