The display on the radio is not illuminated when the radio is on. Possibly the bulb? Oddly enough, sporadically it does work, but after turning the radio off and then immediately back on the light is off again. Before I make an attempt to pull the radio, could it possibly be a grounding issue elsewhere in the car? Might the bulb be easily accessible once the radio is pulled if I go that route? Any suggestions on resolving this issue will be appreciated. Thx.