If the display of your exercise bike/crosstrainer goes crazy (for example, the display automatically goes from U1 to U4 at a rapid pace), there is a short circuit in one of the resistance buttons on the handlebars. To continue training until the technician has visited, you can disconnect the cables from the resistance buttons and continue training by using the display. You can submit a service request to us to have the button replaced by our technician or to replace the button yourself.