John C Columbus , KS May 12, 2019 Appliance: LG Refrigerator LMX25984ST00 Lg Refrigerator Lmx25984st00 / : Temperature displays was unreadable. How to replace Display Power Control Board Assembly. Replaced PCB Assembly display card. Had about 12 screws to remove and replace. I believe 4 or 5 wires to plug in. 8 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes