My radio audio and CD audio has disappeared on a 2004 ES-330 with nav. Nav audio continues to work. The screen has stopped beeping when touched, the volume control does not make the volume numbers appear in the upper right of the display, and I can't change the equalizer or balance settings, both of which have reverted to their default center positions (not where they were when it was working). Pushing the volume button toggles the "AUDIO OFF" display. The radio itself seems to be working -