Potentiometer failure?
Parts are available from Patterson Medical and if you have no joy with them, Kinetec in France are very helpful.
Edit: most of our failures with Kinetec CPMs are either the potentiometer or patient control button. I seem to recall that the pots are available from RS or Farnell.
Last edited by Rallium; 23/03/15 7:50 PM. Reason: extra info