Marine Garmin 492 has suddenly lost all satellites. I have checked the connection at the external antenna to the unit. I see no rust or corrosion and the pins seem to be straight. Also the power has recently started to go off on occasion. It starts up immediately when I push the power button. Again, I have checked for corrosion at the power cord unit connection. At least twice a year I have sprayed contact cleaner at all points and then with Boeshield T9. I had it turned on for hours yesterday while fishing and it never received any satellite signals. Any suggestions?
