On my model 16, the tip of a 1/4" stereo plug detached with attempting to remove it from the headphone jack. Now when trying to insert a new plug it only engages part way into the jack. I have attempted to disassemble the board myself to access the Jack but there is far too much involved and is beyond my skills and confidence levels. Any suggestions on service and repair shops in the Portland Oregon area? This is the board we use at our gigs and hopefully can find a shop with a fairly quick turn around. Any help is appreciated.