issue in my pc

I have Asus vivobook 14, with windows 11.

While everything goes well, suddenly the Lapton screen turns off but the keyboard light remains on. Also, if a video was playing, the sound keeps coming even after the screen turns off. The screen does not turn on when any key is pressed. And one thing is that the battery indicator starts blinking when this happens.

To make things normal i have to hold the power button for few seconds, and the pc reboots.