Laptop screen is black but works with external monitor

EladAssia

Commendable
Aug 5, 2016
3
0
1,510
Hello, sometimes when I turn on my computer it boots as if there an external monitor connected (but there isn't) and the display is on the laptop monitor is black. However, when I connect it to an external monitor I can switch it back to the laptop monitor and it works. I'd appreciate any advice.