Hey guys, my backlit keyboard has stopped working lately .. The "F5" and "F6" keys don't work .. I've tried resetting the SMC, unchecked "adjust brightness in low conditions" in the keyboard preferences, verified permissions and disk and even did a hardware test to see if there is a problem with the ambient light sensor but everything is OK .. However, my keyboard won't turn on .. Any ideas ???? I think that this may be a software problem and that is why I'm posting here .. EDIT: I have attached an image of the "F5" and "F6" keys when pressed ..