Try connecting it via a temporary overland connection to where your downstairs tv is connected. If it works then you likely have an issue with the wiring and will need to rewire it. As much as this sounds bad there's many options with the basement in a large fiver.
2013 Ram 3500 Megacab DRW Laramie 4x4, 6.7L Cummins, G56, 3.73, Maximum Steel, black lthr, B&W RVK3670 hitch, Retrax, Linex, and a bunch of options incl. cargo camera
2008 Corsair Excella Platinum 34.5 CKTS fifth wheel with winter package & disc brakes