I've had a Travl'r dish since 2012 and have experienced what you described on several occasions.
When the dish was relatively new it had to be replaced twice within 12 months. But then everything worked fine for a good long while, until it didn't. I went through all the diagnostics and did Winegard's standard practice of replacing cables, power inserter and LNB but with no luck. Then someone suggested I should pull the cable connection plate on the turret and "exercise" the connection by unplugging and plugging back in several times. It worked!
I guess corrosion builds up on the contacts of the receptacle and the repeated disconnect/connect motion rubs them clean enough to reestablish contact.
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