My 2015 Winnebago Vista has a separate sat and cable connection in the utility bay but I was never able to get the sat one to work. The sat connector in the cab overhead compartment apparently was not connected to it. I never found anything referencing an A/B switch although that would make sense. I ended up putting my dish on the roof and per Winne's info, bored a hole and found the sat prewire cable where the info sheet said it should be. When I connected the dish to that, the sat connector in the overhead worked. I found that while I bought my dish to be portable, the extra height of the roof was a wash with the ability to move the dish around on the ground. Since I was climbing up there more often than not, I just mounted it up there. I also had trouble with the HDMI to network converter that Winne uses to get the sat box signal to the TV. The converter said it was for cat 5 cable but the prewire was cat 6. The replacement box from Winne under warranty did not work either (also said cat 5 on it) and researching online found there is much discussion of whether or not the converter must exactly match the cable type. I found a converter on eBay for $35 that called for cat 6 cable. I installed it and it worked fine. I was tired of making trips to the dealer so I just ate the cost and wrote it off to educating myself on converters. Are you sure this is not your problem? Are you getting any pix on your TV from the sat box? If you have your sat box in the overhead to use the HDMI connection there and are getting a blank screen, check the converter and the writing on the network cable to the TV (and 2nd half of the converter system).
