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LG model number LSXS2638D/01, Stainless steal side by side. PCB Board on Top of refrigerator

No 12V power going to 3 way valve.i have replaced all true real thermistors refrigerator had one in refrigerator section two in freezer section. One of them being a defrost temperature sensor.. there has been no LED light on motherboard board or PCB Board..I replaced the PCB board with new board, still no 12V going to 3 way valve. And no LED light on NEW PCB or motherboard.. even after replacing PCB Board NEW ..No 12V going to 3 way valve and no LED Light on board. Help any one know LG refrigerators

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52f3d145-54c2-4885-b0b7-dceebc8d9c83.jpg
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