We have a patrol car thats acting up right now. Sometimes the control head flashes all the buttons, and nothing works. We shut the car off and turn it back on and everything works normally. We've been trying to recreate the problem and trying to determine a pattern to making it malnfunction. There's no apparent trigger for it, but the Cencom has done this to us twice in the last 2 hours. Any idea what this means or how to fix it?