The black screen has an M1 chip, but it is working.

After updating my 2020 Mac Air with the M1 chip, it suddenly showed a black screen. The keyboard lights up, but the screen remains dark, with only a dim backlight visible. No reset button helped. After connecting it to an external monitor, I confirmed that the laptop was working. No amount of manipulation brought the monitor back to life, but I finally found a solution. It's not perfect and doesn't completely solve the problem, but it does allow me to turn on the monitor. You need to change the system language in the settings, and then after a reboot, the monitor will automatically prompt you to change it. You can do this regularly, but you always need an external monitor to change the system language. I hope these workarounds help you.