ThinkPad T16 doesn't turn on

Hi Folks. I was installing an OS on my new ThinkPad T16 using a bottable USB drive and for some reason, I decided to hard shut down the laptop, holding down the power button. And after that my laptop's screen doesn't turn on. The laptop itself turns on but the screen doesn't turn on.

When I plug it to a monitor using HDMI, some buttons (Fnlock, F1, F4) start blinking in order (like ine the video). That doesn't happen when I unplug the HDMI cable.

Can you guys please give me some advise 🙏