Anyone got any clues why backlight stops working, and in fact disappears from the Display and Keyboard preferences (ie no checkbox in prefs). I have been following threads on Apple discussions, but no solutions. It isn't an Expose Fn clash. Some people have suggested logic board problems, others software. Help!
PB 15 AL 1.25ghz/Airport/Superdrive/1gig ram OSX 10.3.7