Hi, so bought a house with this ADT system that was off (3 keypads dead) and then I found the power for it so I connected it. The keypads (LCD displays) attempt to start in safe mode, give an error and says open circuit. I don’t want to pay for ADT monitoring but wouldn’t mind having it just to make noise if someone breaks in. I know if I call ADT, they won’t want to fix it without a contract. So, is it worth fixing and how could I get it fixed if so? Any help is appreciated!