I would call Garmin and speak with technical support. Most of todays gps/sonar have a system reset procedure that may fix the problems. If not, they can advise you what else to check for and suggest a replacement unit if need be. Good Luck!
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.