Presence control has no effect
Hello, this is my first post on this forum. I have been using a Lyric system in a D-18VS for a few months and decided to carefully move it to a D-18GE, trying not to stress any of the components. The controls seem a bit strange now. It seems as though the volume control comes full on with just a slight rotation and then has no effect through the rest of the range of rotation and the presence control makes no change whatsoever in the trebles. I changed the battery and its still the same. I would appreciate any ideas of what it could be?