Yamaha DTXpress/DTXplorer/DTXtreme

Glen,

Unplug the cable out of the back of the PCY65S and plug it into the
snare and try that.  It will eliminate the cable and module as the
problem.  You are then probably left with a faulty PCY65S (assuming
the plug was plugged in fully).  However, I don't understand the sound
you are describing.  A faulty rim switch would just give the same
sound from both the edge and the rim.  Can you still choke the cymbal?
 Maybe the (faulty) rim switch is making and breaking so you are
getting choking of the rim sound?

Keith.