Excitation (1976)

Helena (Kate Hansen) and Renato (Flávio Galvão) are a couple who leave behind the big city to live in the comfort of a beach house, far from all their previous complications when the wife started to suffer with strange visions. But their problems are from over when all the electronic objects of the new house seem to have a life of their own, scaring the woman and making her look more insane each day goes by. Her husband and neighbors don't believe her stories of being attacked by such objects but a mystery about the death of the previous owner might explain the truth behind the strange occurrences at this residence.