MacBook screen goes black but external monitor stays on
Hi, just wondering what would be the issue with my macbook? I have an external monitor hooked. Lately, my macbook air's screen would turn black, but its working - like i can still do my stuff but I can't access the documents opened in my macbook display.
I dont know how to open the screen on my macbook. If I close it, both screens would be black and I have to turn off the thing and open again. This happened in the last 2 days. I tried unplugging everything but if i plugged again, i will have 2 black screens.
(I've been a longtime windows user and just switched to Macbook last year)