Please open the amplifier and check from the power supply to the output section. You will need a multimeter to check for the ac input , then the fuses, the switch continutiy and the output secondary section ac. Now the DC to the circuits, the rectifiers, the filter capacitors, fusible resistors. Once the power is coming over to the main board and to the output drive, the premap section needs a check . The fault will be around this section if the outputs are clean. hope this helps.Good day
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Please open the amplifier and check from the power supply to the output section. You will need a multimeter to check for the ac input , then the fuses, the switch continutiy and the output secondary section ac. Now the DC to the circuits, the rectifiers, the filter capacitors, fusible resistors. Once the power is coming over to the main board and to the output drive, the premap section needs a check . The fault will be around this section if the outputs are clean. hope this helps.Good day