Mazda CX-9 navigation center not working
 

I had to replace my battery and when they put the new battery on my navigation center went off and we couldn't get it back on. Dealership said they didn't know what to do!
Any solutions???

What year? In older models pushing down the Volume Control knob would Mute sound but in recent year models is both, short touch Mute and holding it down for a second is the ON/OFF switch.
If is not that you need to start checking fuses.