ecm101

hey guys im actually new to avic411, but everyone seems to b pretty savy to the ins and outs of the system. i have a d3, and the volume knob doesnt wrk in controling the volume, all of the other functions of the knob wrk (the push button part that selects input, and mute) but turning the knob does nothing. is there a fix to this problem, or am i screwed and need to replace the face, or the whole damn thing..... help guys....thanx