Use a multimeter to cehck for a short on the diode as you have mentioned a blackening. if so disconnect and test out of circuit. if this is short you have the culprit, if not check the power output section for a short. check also on the speaker connections/ the wires for any short.if so trace and correct. I hope this short will change the status of the protect. Good day
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Use a multimeter to cehck for a short on the diode as you have mentioned a blackening. if so disconnect and test out of circuit. if this is short you have the culprit, if not check the power output section for a short. check also on the speaker connections/ the wires for any short.if so trace and correct. I hope this short will change the status of the protect. Good day