This seems to be a chronic problem with this model. Moisture builds up inside the CANION case and reacts with the aluminium to form a corrosive substance that causes intermittent shorts and eventually death to components on the controller card. I suggest regular revision of the card and housing and maybe try a packet of silica gel in the enclosure,,

There are two SMD components on the lower left hand side of the pcb that are identified as 600 106. They are tiny 8 pin format. I can't find any information about them but comparing with another controller they measure differently so at least one is kaput. Anyone know what they are ?