Frigidaire Gas Oven will not heat?

I have a Frigidaire Oven model PLGF389A that will not heat, bake nor broiler fire up. The oven light also is not working, yet the bulb is good. While trying to figure out the problem, someone pressed the clean button and now we have an F9 error msg stating the door lock has a problem. I can not figure out how to clear the msg or cancel the clean cycle.