5+ years old - 1.83 GHz Intel Core Duo (circa 2006) Backlight suddenly stopped working. When awakened or turned on, display will work for a few seconds, then goes out. I can see the display just barely (as if brightness turned all the way down). I can use external monitor. Also, keyboard backlight non-op. When I attempt to adjust, I get the circle w/ slash (like a no smoking symbol). The sleeping eye on the front is also dark when computer is on (but works when the computer sleeps).... I think it's usually dimly lit when lid is open. Are all these things linked? Any ideas? also, searched posts and saw similar questions.... none resolved however.