ntell
if talk back is cut how can they mess with the box if it is not visible to the ccs, this sounds more like a software problem which is happening in many areas,try reseting the box by removing the red jumper or also using a piece of wire and shorting the internal battery by touching one end of the wire on the + side and the other end onto the - side of the battery for 10 to 20 secs [ with power to box off] and forcing an update one of these might solve the problem..