You had a bad antennae and Garmin is shipping you a new one. That will
fix the problem. I am sure Garmin would love it if these problems did
not occur. But they back up their products as well if not better than
anyone. Let us know if the new antennae fixes the problem.

I've had 3 Garmin units and they have all worked well, not flawlessly,
but well. I have had King GPS and it worked, but had more errors and
reboots than my Garmin units.