MacBook Pro: External display works, LCD display not recognized
Yesterday I restarted my Macbook Pro to find that the LCD display wasn't working -- there's not even a dim picture, it's just completely black, as if the display was asleep. Up until that point, it had been functioning completely normally, no visual glitches or issues -- the display simply didn't turn back on after restart.
When hooked up to an external display, the computer is still fully functioning. I can tell by looking at the computer's "Display" list that the LCD screen isn't recognized at all -- the only display listed is the external one. Furthermore, when I press F1 and F2, as you would to adjust the LCD brightness, no onscreen graphic appears. And finally, when I close my laptop, the computer doesn't go to sleep like it usually would -- it remains functioning with the external display.
All of which is to say, as far as my computer knows, the LCD display is completely nonexistent.
Does this seem like a problem with the display cable, the LCD screen itself, or some other element?
Is this a good question?
i have a similar problem with my 2017 macbook pro 13". The screen freezes but when connected to an external display, it works fine (the external display) whilst the internal display is still frozen. Before freezing, the display slows down and starts lagging. During the frozen state everything else works ie sound, keyboard, touch bar.
please help :)
by Noob Tube