It's not a hardware issue! I had the same issue but the latest firmware was already installed in my POD HD500. Using the L6 Link to my DT50 everything was fine for a few months and then right before the second set I heard a digital popping on tempo sound. Looked down at my tap tempo and it was in sync with the sound. Then nothing, I had no sound. But I can plug directly into the amp and all is well. This is a software glitch X10 and We need a hot fix.