Like every one else, they never admitted to the problem but in the end they took the old equipment back and I paid the difference in the cost of the equipment. I never lost my temper and blithered on them and they never stopped trying to solve the problem. I know enough about electronic to trace the problem to a single repeatable action and shared the information with them. Garmin did not try to take advantage of me and I did not try to take advantage of Garmin. A lot can be accomplished by just being nice. I was very hesitant about sharing this information and in hind sight I think I made a mistake in doing so.