Problem: I have a question regarding my car it was stopped for more than 6 weeks the Battery had discharge and because of that my TNS510 navigation system had stopped working and it is show a message on the screen which is saying ( call the dealer ) so my question here is there any way to reset the TNS510 navigation system ? Normally if the Battery has discharged all that happens is you loose things like your saved phone numbers and settings on the satnav like places you have been to before. W