Quote Originally Posted by blue_star_99 View Post
It's pity that I can't even flash it back as the battery icon is hidden as well.
You don't need to use diagnostic mode to flash your nuvi. I think standard WebUpdater procedure should work. Alternatively you can find firmware in rgn version and flash it in preboot mode. Your device is in preboot mode for about 30 seconds after switching on, if you hold the switch-on button.