Mom got a Walmart Onn 55" TV. It's hooked-up to DirectTV - she really doesn't need anything else. When she turns it on the "home" or "menu" screen pops up. She can press the "right arrow" once and go to the "DIRECTV" selection and then press "OK" to get to Direct TV.
But is there some way to set this up so when she turns on the TV it always goes to DTV (or at least whatever "source" she was watching last?