My GPS has gone berserk. The navigation system will accept a destination and give route selections (fastest, shortest, or economical)... But when driving with or without a route, the direction and position indicator always wants to take me to the left even without a road. When I stop the position indicator repositions to the correct location and with the proper direction. I did have the system map updated three years ago. Is their a reboot or reset available? Any help here will be greatly appreciated.