If you haven't already - before calling the repairman first check the obvious; turn off or unplug the power to the stove, lift the top up so that you can see the burner and ignitors. Is the faulty burner ignitor connected (has the wire become unplugged or rotted in two?), has anything "boiled" over on that particular burner? if so, give the burner and connection a good scrub with soapy steel wool or something similar, give it time to dry and give it another try. Might be a faulty ignitor although usually all the burners will give problems vice just the one...good luck!