I visited a friend in a nursing home today. He said they switched from cable to dish network and they could not get his Vizio flat screen to work. They had to use an old tube TV to get any stations. There is no receiver connected to the TV, just coax straight out of the wall. Is it possible to have Dish Network or Directv for the whole nursing home and not require receivers in each room? And if so what would I have to get to make his Vizio to work with this setup? Thanks for any help!!!