'91 200 20V TQ Audi / Bose Radio Problem

[Michael Palatas]

Symptom: 
  A few weeks ago, the radio started not turning on when the knob was taken from off to on.  You could get it to turn on by jiggling the knob as you turned it on, or by putting pressure on the knob in a certain direction as you turned the knob.  The jiggling method worked less and less over the last few weeks, and now, turning the knob (jiggling, pressure, or not) has no effect.  The radio is "dead".  
   
  Questions: 
  Anyone have any BTDT stories?  It would appear to be associated with the knob contact inside the radio, but perhaps someone else has another experience.  Is it time for the radio replacement effort?  It would be nice to have a CD!!
   
  Mike in KC