New unit = ~$75 shipped I already have a couple of new authentic Evolv DNA30 boards and charger boards on hand. paid $53ea set shipped.
If you have Tried Everything else like a Center Pin Lift and Continuity Check with DMM, you might be down to the Point where Re-soldering or Re-Placing the Board is about the Only Option.
But before you do. What is the Price Difference between Buying a New Board and Buying a New Unit?