EmulatorII-list

I know this topic has been touched on before, but I couldn't find any conclusive info on a fix.  I have a plain EII that either has a dead voice or channel not sure how to distiguish the two?  Basically if I go into special fucntions and disable channel 3 the EII is playable.   With channel three on,  every 8th note played in succession is silent. Does that mean I have a dead voice or channel? How should I proceed? trace everyhting in the signal path to channel 3? Any hints on where to start would be greatly appreciated.  Thanks