What could cause a temporary loss of all satellite locals with just a blank screen? Clear skies, good signals on spotbeam, guide data & all functions & other channels (including, locals on OTA adapter) normal. I don't know how long it lasted other than 20 minutes or so after I first detected it. I had tuned to one of the missing locals and had been stepped away for a few minutes when I heard sound return - sure enough, locals all returned simultaneously. Been with Dish a very long time & have been early adopter of every new iteration of the Hopper and thought this was very odd.