I went to start my tractor this morning and it was trying for about 30 seconds and then stopped trying to turn over. On the LCD display a new light is showing up I have never seen before. It is a shape of a rectangle with two filled in triangles pointing at one another on the left hand portion of the screen. I can still see the 99.1 hours of use, and then the rectangle shows before this. It won't even attempt to turn over. I am not sure what this symbol means????