I have recently had Dish Network hook up a Hopper with Sling and two Joeys, one for the bedroom and one for the kitchen. After about 10 to 20 minutes the tv blacks out with no sound or picture. Dish techs. have replace the line from the dish to the switch on the house, replaced the LNB, replaced the cable from the hopper to the switch outside, replaced the hopper and the two joeys. We thought it was the ethernet cable, so we unplugged the cable. All of this has been done and I am still having "Blackout Issues" Any suggestions other than not having DishNetwork?