StageScape m20d sudden loss of Audio Output! in StageScape Mixer / StageSource Speakers Posted June 15, 2016 As Rewolf has said, My first port of call would be the ribbon connectors . Mine was cutting out and I lost complete trust in it using it Live. My Tec put a very very weak glue on the ribbon connector and 6 months later not a single problem. The design of the ribbon connector Is not great TBH , It's just a plastic compression clip.