I have a new-to-me 2012 Civic EX. The Volume/Selector knob does not function. The outer ring rotates and the center button pushes, but nothing happens. The radio works and some functions can be accessed via the steering wheel controls, but need to be able to access balance/fade and bass/treble. Can this control assembly be replaced or does the entire radio need to be replaced? Any chance that it might just be a loose connection? I located a schematic that showed a half dozen or so wiring bundles plugged into the back of this panel. Any suggestions greatly appreciated.
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