No guitar output sound--expression pedal?
My GNX4 has suddenly developed a problem. I have no output volume for the guitar through both 1/4” Outputs. However MP3s/backing tracks can be heard through the XLR Balanced Outputs. Also, the Expression Pedal seems to no longer work. That is, it does not enable effects or work as a volume pedal. Any ideas what could be the cause of the problem?