Appliance Repair Questions? Ask a Technician for Answers ASAP
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If there were burn marks on the PCB, replacing power relays is not likely to solve the issue. Other components were likely damaged. Did you replace just the power relays?
I suspect the entire PCB will need to be replaced. Would you like the wiring diagram and service manual to work with once you get the report?
Well, if there is power at the PCB but it is totally dead, it is indeed faulty.
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The wiring diagram and the service manual are attached. Check for line voltage at the pins from the main power switch. If you have power to the PCB, it is faulty if it does not light up. The manufacturer does not provide board level schematics, so there is no board troubleshooting you will be able to do once power is verified.
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The voltage to the board is line voltage, 230 VAC. The loads are all 230 VAC (wash motor, drain pump, etc). So the only important voltage is the one into the PCB. If the PCB is dead and it is getting voltage, that will confirm failure.
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If that is the case, the power switch is faulty.