Customer Questions and Answers for Pcb Asy,Sub by Lg

Joe, the inverter board EBR64173903 would need to be inspected for a flashing LED as this can tell quite a bit about what's going on. If there is not a flashing LED, then the inverter board would need to be tested for 120VAC at connection CN2, and if there is voltage, the inverter is bad. If there is a flashing LED, this will indicate a failure. If the LED is solid, then there is a communication failure between the main control and the inverter which can be tested for a pulsing DC voltage at connection CON201. If there is a pulsing DC voltage, the inverter has failed. If there is not a pulsing DC voltage, the main control EBR67348009 has failed.