1( tight the ribbon cable and clean it,
2) tight the plug from display board , and clean it.
3) tight the display board vs lower board and clean it unplugged the power
4) test the fuse and replace if necessary or c.breaker reset.
5( Finally adjust the REED SWITCH , clean it and tight the plug very well see the diagram attached.
6) see the block attached. finally the display board can be faulty.
God bless you
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