My Jack is original equipment and worked OK when new and for a year or so after. It just stopped working here in Florida I think although I really didn't use it for the last six months. The switch itself is controlled by the power boost. Button in and Jack on it shows blue lights. Push button off and don't touch Jack (remains in the on position) lights go off. I turned satellite receiver off and no change. I am thinking the head has stopped working and may need to be replaced. I am wondering if anyone has had a defective Jack antenna that needed replacement and also is anyone using a SWM satellite system with a Jack antenna. Love the SWM as it allows for recording and watching separate channel on both front and back TV's. Especially nice during Olympics.