Lorwrance gen3 hds

Is there anyone around or near Dickson tn. That could help me with the 2 units on my boat.. had them for several years and everything was fine until today.. the gps and point 1 has gone crazy when trying to go to waypoints can not get closer than a 100 ft to waypoint without the map not turning or saying the waypoint is a different direction

Resetting is the first steps in troubleshooting ...

(Soft reset does not affect waypoints - hard reset erases all waypoints)

https://youtu.be/hCudDNFCfYE

Rickie