Robert D Omaha , NE January 05, 2016 Appliance: Samsung Refrigerator RF28HMEDBSR/AA-0000 Samsung Refrigerator Rf28hmedbsr/Aa-0000 / : The appliance (frig) did not cool. How to replace Refrigerator Ring Insert Fastener. Obtained new mother-board and front-panel touch-screen. Replaced Power Cord for good measure. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours