I ejected a CD last night from the unit (which had been in there for ages). Now it won't load another CD. Recently I noticed a few of the buttons had not been lighting up. Could there be a light sensor in the unit which is broken when a CD is inserted, which makes the CD load. If the light source is one of these filaments that is out, then I guess this would cause the problem. Anyone any ideas and also, how do you change the blown filaments. Thanks in anticipation for any help given. Mick..