How to Diagnose and Repair Transistor Circuits - No Schematics. Dynacord Powermate 600

This Dynacord Powermate 600W Powered Mixer/Amplifier is stuck in protect mode. It has mainly discrete transitor cuircuits and have I have no schematics that match the version I have. But I still need to fix it. Here is a practical example of how to diagnose a difficult fault using nothing but methodical fault finding, basic electronics knowledge, some intuition and a multimeter!

Music in this video
Barbara Pennington - 24 Hours A Day (1976)
Learn Electronics Repair #249

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