Video Dead (1987)

A brother and sister move into their families new house while their parents are away on vacation. The family bought the house sight unseen and there is an old tv set in the attic. The brother brings it down to his room and discovers the only station that comes in is playing a zombie movie. What he doesn't realize is that not only does this tv only play one movie, it comes on by itself and is a portal for the zombies to come into our world.

A zombie hunter who is trying to track down the tv comes to the door, but the brother sends him away. Turns out the only way to stop the zombies from coming out of the set is to tie a mirror to the front of the tv, with the reflective surface facing the it. Too bad they didn't do this before the zombies started wandering the neighborhood.

The zombie hunter, brother, and sister attempt to fight the zombies as the undead start eating their neighbors. The group ties mirrors on the doors of their home, as apparently mirrors repell zombies.

There's some stupid stuff going on, including a woman who comes out of the tv to seduce the brother. But one thing I don't recall ever seeing before is a zombie attack from inside a washing machine.