Per the title. The main map screen has an audio symbol (box with a speaker in the center and a line going from upper right corner to lower left corner) this symbol has a light background with a dark foreground. When selected the colors reverse but no audio. When you start directions the canned "follow all traffic laws, etc." can be heard but that is it, nothing after that. I have been through ALL the menus on the screen and have everything correctly set. Still no audio. Local dealer "expert" tells me to just bring it in. No suggestions, nothing from him. Any ideas?