Trace the voltages from the main power supply which is a switch mode power supply . The main voltages to the drive circuits , the voltage to the processor section. The standby light is an indication that the SMPS is working but a further analysis of the voltages to the different circuits will confirm the fault. If the processor is checked for the +5 volt to the IC, check the oscillations at the crystal, check for processor data transfer if the processor seems to work. now make sure the reason of shut down, if feedback is not received from the circuits. Make sure there are no open fusible resistors that has failed and cut off connection due to a fault in the corresponding circuit. All these checks will need you systematic check with a technical support to confirm the failure.
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Trace the voltages from the main power supply which is a switch mode power supply . The main voltages to the drive circuits , the voltage to the processor section. The standby light is an indication that the SMPS is working but a further analysis of the voltages to the different circuits will confirm the fault. If the processor is checked for the +5 volt to the IC, check the oscillations at the crystal, check for processor data transfer if the processor seems to work.
now make sure the reason of shut down, if feedback is not received from the circuits. Make sure there are no open fusible resistors that has failed and cut off connection due to a fault in the corresponding circuit. All these checks will need you systematic check with a technical support to confirm the failure.