George M Conway , AR August 30, 2015 Appliance: Whirlpool Gas Range SF5140ERW4 Clock/timer unit had numerous led segment failures Pulled the stove out from the wall, unplugged the stove from the 120v. receptacle power source, removed about nine screws to free the back cover, pulled the control knobs off the face panel, disconnected quick disconnect from power terminals & removed defective clock/timer unit, set replacement unit into the panel and reversed the process to reassemble. Read More... Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes Tools: Pliers, Screwdrivers