Thank God for ChristianBad!!!
That worked! But....
As I said, I had just picked a rig and was jamming along, and then this happened. Is it something that a rig can cause the output to change? I mean, is there rigs that would change the output to maybe go to a different power amp or something??
It was weird, because since I posted, I did think to unplug the power cable, as I saw the power button illuminated. Still did nothing. Then I plugged a TS cable into the 1/4" jack on "Send" on the back of the unit. I then had a totally dry signal, no effects at all. I could see the light showing I had plenty of input signal. I'm usually good at troubleshooting, and I thought I had checked the obvious.
If I had a rig with a LOT of reverb and delay, you could hit a chord, and nothing then the wet signal snuck in. I'm like "great, I've owned this 2 hours, and messed up already...."
Thank you! As I said, I'm total n00b to Kemper, and have been thoroughly enjoying it so far.