My Lenovo legion Y540 has a black screen. I got the notebook a few days ago, yesterday I tried to install a video driver, and it gave me a screen error, lines came out. I panicked, I tried to watch some videos on YouTube, I saw there that I had to restart Windows, I tried and it wasn’t accepting, I ended up messing with the BIOS, I don’t remember very well what I messed with, but now when I turn on the notebook, a little dot flashes in the upper right corner, and then the screen goes black. I’ve tried several commands and nothing, I ask for help in solving it.
You don’t remember? That’s too little to guess any reason.
To exclude firmware related problems dump your firmware with a programmer and attach it here.