Black screen and VoiceOver on

Hi everyone, the screen of my Macbook pro (intel processor) is black. I used to hear a message saying "VoiceOver on" or "VoiceOver off" when i used the volume buttons and then it kept saying "Username" when i used the enter, shift, space or tab buttons.

I tried doing what was explained in this thread :

My screen is black. I hear a message say… - Apple Community

After having resetted NVRAM as well as SMC, it doesn’t do the voiceover thing anymore, but the screen is still black.

I tried to start it in safe mode but it doesn’t work.