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So unfortunately you just have a bad display control board. This can be replaced if you wanted to fix the microwave but the cost for the board is rather expensive. The part number for the display board is WB27X11179 and it costs about $60. Below is a link to the part you'd need to order and replace for your model number. The display board is just like the mother board in a computer so it controls everything and unfortunately is very weak against power outages.
CLICK HERE for control board
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