The Dynacord DC‑CMS600‑3‑MIG is an 8‑channel compact mixing console featuring four mic/line inputs, two mic/stereo‑line inputs, two stereo‑line inputs, dual 24‑bit FX processors and a USB audio interface for PC/Mac connectivity. Common failure points in this class of mixers include power supply voltage drops, tripped protection relays on the internal PSU, faulty input jack contacts or degraded speaker/FX processor circuitry, and firmware corruption that can cause channel routing errors or blank displays. First‑check diagnostics: verify mains voltage and PSU output rails; inspect all input jacks for physical damage or loose connections; review any error codes displayed on the LCD or via USB interface; and test each FX channel by bypassing the processors to isolate a possible unit fault.[oss-gpt-20b]