I have an LG all electric range - LSE3092ST. It would intermittently bake fine, but typically it would get to temp and fail to keep it there. i.e. preheat to 350, 30 minutes later check on food, and the over is barely warm to touch.
Anyway, all symptoms pointed the power control board. Easy swap, but in adjusting wires for proper routing once it was running, the black wire coming into the DLB relay was very very hot to the touch. I thought a few wires may have frayed causing high resistance, but it doesn't really seem to be case when looked very close.

Any ideas on a cause of the hot wire?

here's the control board i'm speaking of - far left relay and the black wire plugs into the horizontal terminal.

power control board

Thanks in advance, I can try to load more images if needed.