Thanks for the reply Bandit. I spent some time and figured out that having a cble plugged itinto the stereo output of a Visual Sound H2O but not having it plugged in on the other end turns off the sound on the main output. That makes no sense as yet. My pedal setup is too complcated.
I can’t get the effect loop to pass a signal any longer. The cables work as loopbacks. If I run the guitar directly into the effects and output directly to the amp, that works. But running them through the effect loop won’t work. I’m out of ideas. This used to work.