OFF and TIME controls don't work on my freestanding gas range. LIGHT, above them still works. Right side controls work. Oven only goes off by turning off electricity. I unplugged and took off top back panel; control pad has slipped lower on left side and is less closely attached to back surface of range. Seems attached with some type of soft adhesive. Could this be the cause? How to fix it or must I call a repair person? S.