I recently purchased a 2012 RT Limited. The radio was working fine until I bumped the control getting off the bike. It now has no sound. I verified all settings. I have held the up volume to take it off mute. I can see the volume indicator move up and down, with both the front and rear controls. I have disconnected the battery for a few minutes to see if that would reset the system. I am stumped for now. Any suggestions?