I have a garmin striker dv that has given me reliable service for years. Today I was in a hurry to get out and go fishing and put a new battery in the boat. The motor went down right and I assumed the polarity was correct. The starter spun without engaging. To check system voltage I tried to turn on the sounder. Nothing. I determined that the starter bendix was working and realized that the battery polarity was reversed. The engine started and I untied and began turning on instruments. The plotter came on but the sounder was dead. I checked the cables in the back of the sounder and they were plugged in all the way. There is power at the fuse rail, the fuse is fine, the negative bus is fine. But the sounder will not come on. I fish for a living and not having the ability to see what is going on down there renders me blind and would leave me wasting fuel and time playing fish bingo. Is it toast? If so what specifically is toast inside the sounder? I have a soldering iron and access to components, but not the kind of deep pockets that technicians and electronics dealers require.
