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F11 has nothing to do with the display board. F11 means that your door latch assembly is stuck somewhere between the open and closed position. You'll need to pull the oven out and remove the top sheet metal panel in order to access the latch motor and such on the left side of the oven. There is a little switch below the latch motor that you'll want to test if you have a multimeter to see if it is making and breaking continuity properly. If the switch checks good then replace the latch motor (part number 490365) , otherwise replace the latch switch (Part number 600145).