This model number does not show valid, please double check. In general, if the surface burners work, then suspect a bad oven ignitor. Does the ignitor glow? If so, and the burner doesn't come on within 30 seconds, replace the ignitor, it's weak and not passing enough power to open the gas valve. If the ignitor does not glow then you must check the ignitor for continuity (replace if open/no circuit) and back check the circuit for lost power. If not the ignitor then suspect a bad relay on the control board.