Samsung NE597N0PBSR E-84 Error, second time

I've got a Samsung NE597N0PBSR induction range that's got an "all stop" (nothing works) error code E-84. The first occurrence was while under manufacturer warranty and it took the bumbling subcontractors 2 visits to figure out "that's a real error code!" and eventually they escalated to a higher level guy who replaced an entire main board. The entire process took over a month due to their scheduling restrictions and ordering replacement parts.

Now I'm getting the same error code for a...

Samsung NE597N0PBSR E-84 Error, second time

via Samsung NE597N0PBSR E-84 Error, second time
by enkslcjue