I've got a house that the door chime stopped working (making a chime
noise). I know it's not the outside button and the two wires outside
that connect to the button (that go thru the outside brick wall) when
touching each other showed some spark. One repair guy asked me if
it's a 16v or 24v transformer and I don't know. He seemed to say it's
not a part of the chime box inside. I thought everything was self
contained inside the chime box that mounts on the wall. Is this a
DIY job??? Any good URL to watch on this repair?