My 176c won't turn on after some time in the sun on the boat. It shut down by itself. turn on two more times and lock up, then it was all over for it. Garmin just told me the can't fix it. Not two happy about there responce. They just wanted to try to sell me a cable and told me if I can get it to turn on the up grade softe ware, witch was done a year ago. I have alot of money in this thing with maps and all the options. I use it a lot on the boat, the whole 5 times a year I use it. It has been it he sun before on the boat and has not bothered it. I'm just a little upset right now that it quit with the way Garmin responed.
Dan