My unit fired up and was working fine until.... I went out today and the display was blank. I shut off the cb and opended it up to find mice had built a nest in the wiring box and chewed all the wires shorting out the circuit. I tried just cutting and splicing the wire, but it's still dead. I'll put a meter to the transformer tomorrow to see if I am getting 24volts, I have a 240v system. If I have power, I would guess the main circuit board is fried. I can fine a board online, but not the tranformer. Anyone have any suggestions?