Originally Posted by
dov_elyada
Thanks, Ron.
There occurred a variety of hardware-looking problems, non of them was related to loss of GPS signal. Examples: (1) The moving map and GPS position marker froze and the on/off button did not respond; since I couldn't use the reset button in flight, I yanked the supply cable out and waited until the battery was used up. (2) The map stopped moving and gradually the GPS position marker went out of the frame. (3) Recurring crashes: suddenly the navigation software would go off and restarting it would keep it going for only a minute or so before the next crash.
When installing the GPS on the dashboard I did pay attention to vibration isolation. The dashboard itself is padded with foam and vinyl upholstery and the spring clip pressing the base of the pedestal to it is doing so through a thick and soft rubber cushion. That's why acoustic noise was my most likely culprit. Yet the possibility still exists that what I've done to isolate vibrations is not sufficient.