Hello. Our power went out last night for a few hours, but unlike other times it has gone out, the display did not say "PF" - it just went dark. Now now of the buttons respond to the touch. The oven light still works. The stove burners still work. But we cannot use our oven with the display lights out. We also do not have a manual for this oven as it was among the last that Lowes sold in 2004 and they didn't have one. Can anyone help? Thank you. Mary B.