On our 2017 Cardinal, I experienced the same thing. Eventually I pulled the panel to see BEHIND the docking station area (where water, cable, satellite, etc. enter). I found a splitter back there but the problem was...the INPUT for the satellite was attached to one of the OUTPUT sides. I disconnected it and the cable that was attached to the INPUT and swapped them.
Instant fix - and five months later it's still working fine.
I can't help but wonder if someone did that just to cause grief - or perhaps it was lunch time, or a new employee, or who-knows-what, but that was a stupid mistake.
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Robert & Estha Shiflet
Georgetown XL 378TS
Jeep Gladiator Willys Tow Vehicle
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