These buttons are illuminated by L.E.D.'s and are connected to a small circuit board that is concealed by the buttons. My personal experience is that these typically don't "go out" partially - usually it's all or none. May I suggest making sure the buttons are clean - please take no offense,I don't believe you are a slob, but dirt and grit can obscure the numbers. If not you can replace the radio face by buyying another go to: http://replacementradios.com/product_info.php?products_id=742
Or trying craigslist for a similar radio..
I hope this helps