Answer Hello Paul. Make sure there are no bad wires on the unit. If not, and there is power to the board, but the lights do not work, see if there is power coming to the transformer from the board. If so, and no lights, and the lights are good, replace the transformer 00487414. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. Hope this helps. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Thursday, April 12, 2012