the bulbs for the radio backlight do go bad, you might want to check that. just take the radio out and the front face of the radio unclips (be careful not to break a clip) and you'll see the bulb attached to a circuit board. grab them with a pair of needle nose and twist left (qtr turn) and it comes right out. i'm in the process of looking for a bulb and when i find one i'll let you know.