During a scene in the kitchen, there's a quick background shot of the far wall in the living room. It shows a set of shelves, next to the coat rack. When the Conners visit the identical house of the Bowmans, Roseanne complains because they have the exact same shelves she wants for their living room. Dan had told her it wasn't possible because it as a load bearing wall.
When the power is cut off, the sound on the TV slows down before stopping. That would happen with a record player, but not a TV.