OTA - most likely there are no TV stations within range, or your antenna is not on and pointed in the right direction, or you have not turned on the OTA antenna power (green light on panel).
Cable TV - OTA antenna power left on, cable not plugged into proper port in basement (or basement port mislabeled, TV not reprogramed/rescanned for cable channels, no signal on the cable line in the campground.
You could also have a bad splitter (front, right side cabinet where the antenna controls are). Remove the front of the panel and be amazed by the number of wires. Splitters are back there and could be bad or loose connections.
The A/B switch is only used for satellite connections. Roof top antenna vs. tripod mount.
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Roger & Mary
2017 Winnebago Navion 24V (Sold)
2014 Tiffin Phaeton 36GH (Sold)
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