2010 buttons flanking display don't work.

My 2010 touchscreen works, however the buttons down each side do NOT:For example, Pwr / Vol; Close; AM; FM; SAT: CD; Audio; seek/track, DEST; Map; etc. The temp control unit below this works fine. The steering wheel buttons can turn audio on and off and adjust volume. Ideas? Is there a fuse that controls ONLY the power to both sets of side buttons? It did not seem so to me.