I have a new Helix LT. I play in a church worship band. After playing with it at home creating patches, etc I brought it to our rehearsal night to try out.
My current rig is a POD HD500X plugged into a Behringer powered monitor, with an XLR out of the monitor to the house. I have a couple pedals in front. Everything is plugged into the same power strip. I've been using this setup for a couple of years.
So Thursday I swapped out the HD500X for the Helix. For about 5 minutes, everything is fine. Then the sound went dead. I wiggled chords. When I unplugged the output (1/4 out L/Mono) from the monitor, there was a huge pop. Plugged it back in, another pop. Turned off the Helix, pop again. Turned on the Helix, another loud pop, still no sound. So I swapped the HD500X back in and hoped I hadn't damaged the Helix.
When I get it home, it works perfectly fine with the 1/4 L/Mono out into the Effects send of my tube amp. No apparent damage.
Any ideas? I bought this thing to use at the church, with plans to sell the HD500X to help pay for it.