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Replacement parts for Frigidaire FCS388CESE Frg/electric Range | AppliancePartsPros.com
I would unplug the unit and reinstall the connections onto the board.
Might not hurt to clean them with electronics contact cleaner or isopropyl alcohol. Just make sure all the solvent has evaporated before reinstalling.
This is a bit of a long shot, you probably have a bad control board.