I would try unplugging the unit for 60 seconds. If that doesnt work, you might need to do a hard boot, which resets the unit and loses your preferences, etc. I forget the sequence of events you need to do for the hard boot, but I believe it is in the operating manual or a dish tech will tell you. It is a sequence of buttons that need to be entered and the system shuts down, dumps its memory and starts fresh again.
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