When I plug it in...it starts beeping and the display says AUTO with DEF under it. But it is cycling thru numbers: 1.0, 2.0,3.0,4.0,5.0,6.0 then back to 1.0 and so on. Over and over and over
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Main Control Board
If the microwave display is not working the main control board is most likely defective and will need to be replaced.
Display Board
If the display has gone out the display board might be defective. If the display goes out completely the problem can be either the display board or the main control board. If the display goes out partially the problem is usually the display board.
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