20 Most Recent
Garmin GPSMAP 740S GPS Sounder & Chartplotter 010-00835-03 Questions & Answers
Won't turn on is voltage is under 12.9 volts
Sounds like you have a battery problem not a Electronics Problem. First thing is to solve that.
Also, you have to hold in the button to turn it on for a few seconds. More than once I thought I had a problem but simply did not hold the button long enough.
Not finding what you are looking for?