LED lights still light up without lvds cable plugged in?
So I'm back after a while. My retina 5k now only has two leds lighting up. Previous time I tried it I had 3. Not sure what changed since then. Any thoughts if an LVDS cable could keep the 3rd led from lighting up? Also does the mac lcd have to be plugged in to cause the 3rd led to light up or will it light up regardless if the mac lcd is hooked up?