Hi, I've looked for any other discussions on this problem, but haven't found any. I was trying a DT25 along with my HD500 and JTV-59. We finished a song, and when I went to start the next one, I had no sound at all. I checked all the obvious things, like guitar volume, the volume pedal, whether the tuner was on, etc, but I couldn't find anything wrong. I powered the amp off and back on and the problem went away. After reading a bunch of posts, I bought a AES/EBU cable for the L6 Link, thinking that maybe I'd had a communication error. I had been using a regular mic cable. The same thing happened again. This time, I corrected it by switching to another patch on the HD, then back. It feels like a comm error. Any thoughts? If you don't change anything on the HD500, how often does it update control information on the amp? I was still in my trial period, so I sent the amp back, but I really liked it and would like to buy another one. I just can't have it cutting out in the middle of a performance. Thanks for any feedback.