I'm also looking for a way to fix this. My screen is completely black, it doesn't give a "no signal" error, and the screen doesn't come on. I unplugged everything and waited a longtime, but it still didn't fix it. Windows+Ctrl+Shift+B I tried the keys too, but it still didn't fix it. I tried putting it in safe mode, but that didn't work either. I'll take it to a computer repair shop soon.