So I replaced the battery on my 2008 (this is the third one I have done) and on this round, I am not getting any sound out of the radio. The radio works and so does NAV, but no sound. I also noticed that if I go to the "sound" screen, I cannot adjust the bass, tremble or front/back/left/right. Any ideas???? I did try to reset unit by disconnecting battery again, but no luck.