We've had this issue for quite some time but it doesn't happen every single time we use the m20d stagescape so we've lived with it since it is solved by doing a power reset/cycle.
Here's the routine:
1. The m20d was sitting for days unused, you turn it on even do a sound check, everything works fine, then 20 or 30minutes later after the m20d just sat there idling, there's NO SOUND coming out, and no it does not seem "frozen", the interface works.
2. POWER-OFF and then Power-ON and after reboot it just works fine again.
I've had it one time recently where I was using it to test a new Sennheiser Wireless handheld microphone system and as I was walking back to disconnect the wireless I tried to talk in the microphone again and lo and behold no sound at all, I actually thought Oh No! I thought this sennheiser system was all the rave, and it craps out like that all the sudden!? But nope, I go back to the mixer, I think I even see bars move as I talk but no sound comes out. I reboot the m20d Stagescape and then voila it works again.
Others who use the system have experienced the same problem, sometimes after turning it on and having it sit idle, the sound dies and requires a REBOOT to bring it back.
Has anyone had similar problems with their m20d StageScape?