The power supply filter board LG # 6201EC1006U is my questionable problem. The input voltage comes in on the left side of this board & measures 120 volt AC input voltage. The output voltage on the right side of this board has 3 wires. I measured 120 VAC from the blue wire to the brown wire, but only 60 VAC from the Green/yellow wire to the brown wire. Is this the normal voltages or should they both measure 120 VAC? I have already replaced the front PCB display board and the main control board board #6871ER1085F behind it and still my washer will not power on. The initial problem found was a failed electonic component on the main control board mentioned above.
Answer Hi LG. All filter input and output wires (except the white wire) should read 120 volts as it is checked with the green/yellow ground wire or chassis clean ground respectively. You do not check for 120vac between each as you mentioned. Only from one wire color to ground wire connections. Make sure that all wire connections are tight. I have seen it common that no control power is because of loose filter output connections. The filter part # 6201EC1006U may have failed due to a electrical surge during a storm for example. Use the ohm meter on R x 1 scale and make sure all control board fuses are good (o-ohms) closed circuit not - open (infinity). Thank You. Find the tech sheet inside the cabinet in a packet to assist. Usually under the top. Thank You.