i used webupdater to updated gps firmwire software and to the latest it was doing bluetooth update and i saw a progressbar my battery went dead and the unit shut off during the process when it boots up when i go to system info gps data shows up /na for everything how do i reflash this back as i cant get gps or bluetooth to work i tryed running your tool but it did not fix my problem .Sorry im new here maybe one of you guys can help me out i have a nuvi 660