820 3330, no liquid damage, short on back light circuit. Also having in issuse powering on without magsafe. Machine will stay on without magsafe connected. Machine also powers on the moment magsafe is connected. Can this issuse be caused by back light short or is this a separate issue altogether? I did not want to waste my time fixing the backlight, until I knew this power issue could be solved. Green light on magsafe 12.56v g3h....