The display does not light up / the battery symbol flashes? Check that the 3 x AAA batteries are inserted correctly, as indicated in the diagram inside the battery compartment. Related articles My controller will not charge The symbol * appears on the screen and the controller beeps / emits an acoustic signal? 002 error is appearing on the display? Can I replace the controller battery? The controller is on but there is no stimulation. I can't feel anything. Comments 0 comments Please sign in to leave a comment.