Nigel S Reinholds , PA October 15, 2016 Appliance: LG Refrigerator LFX25950TT Lg Refrigerator Lfx25950tt / Aticlga: My fridge stopped working completely and had just been loaded full of fresh groceries. How to replace Refrigerator Main Control Board. I opened the rear panel and checked voltages on the main board with a volt meter to find that there was no voltage on the low voltage rectifiers (+16 & -16 as marked on the board). Order a new PCB board and had it overnighted, told family not to open fridge to keep it as cool as possible. New board arrived next morning - fantastic. Replaced board - fridge sprang back to life, all groceries and freezer intact. Cool! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes