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diyer2018		#1 Posted : Sunday, June 13, 2021 6:29:13 PM(UTC) Quote Multi-Quote
Rank: Member Groups: Registered Joined: 6/13/2021(UTC) Posts: 0		Hello, The model number is: WM3987 HW Hard reset didn't work (pressing the buttons on the display panel for 5 seconds and plugging back in). I opened up the top panel and checked the noise filter input and output with a voltage tester pen and it seems ok. Also opened up the main PCB and nothing seems to be burned. One of the terminals out of the Main PCB (with 3 wires - red, yellow and black) seems to have power when using the voltage tester pen. The red LED light is not turned on. Should I try replacing the Main PCB? Thank you.


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ThatGuy		#2 Posted : Tuesday, June 15, 2021 12:26:28 PM(UTC) Quote Multi-Quote
Rank: Advanced Member Groups: Expert Joined: 7/27/2010(UTC) Posts: 1,395 Location: near the middle of nowhere Was thanked: 24 time(s) in 24 post(s)		I don't know much about the LGs, but looking at the pictures of the two boards, both seem to have fuses. I would check them first. Follow the power. https://www.appliancepar...01ec1006t-ap5251356.html https://www.appliancepar...r38163341-ap5193084.html


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