I have an edge 840 and when I'm on the map screen it shows my location arrow stuck at the start point. It happens if in navigating a course or just riding.
When I finish the ride I still get a map showing where I rode. And while I'm riding, the white line showing where Ive been still spears on the map.
But the problem is I don't get any navigation, and the map won't move with the white line, it just stays centered on the blue arrow at the start of the ride.
If I load a course I can see the course layout on the map. And if I accept the question of navigate to start of course it will update the course.
I've tried holding down the power button for ten seconds. Starting and restarting a course. The gps is connected.