Screen going on sleep mode every time I type.. SEND HELP!!! I’m losing my mind

I have a razer blade stealth laptop 2019, base model and it has been working perfectly ever since I bought it. I just use it for doing school work and editing yt videos every now and then. It is basically my working laptop However three days ago it began to turn off its screen every time I type. I dont understand what is happening but i have grown frustrated because I need to do so many things on my laptop and the screen goes black. It’s not overheating, it is fully charged... please someone advice me in what to do! I’m crying out of frustration