HDS 9 bow flush mounted on a 2016 Skeeter ZX. I fished a mild rain and the unit went to gray snow distortion like an old TV. I pulled the unit out of the bow to send to Lowrance, then tipped it over and out came about 2 oz. of water? I have had bracket mounted Lowrance's left out in torrential rains and never a problem. Should I be asking my dealer why my 2 year old HDS has water in it? Could it come from a bad instillation?