I have a problem with the screen of my chuwi lapbook pro

Ok to start I have the notebook for 6 months until now, I haven’t had problem so far, last night turn off the notebook and the next morning when I turn it on I notice that the screen goes black, that is, it only turns on the pc but not the screen.
the lighting of the keys works properly, has not had hits or anything for style, I do not know if someone else has the same thing happened, do you know the solution? I have no idea what to do

Do you know if Windows starts? Can you connect the laptop to an external display via HDMI?

no, I have no way of knowing if windows starts and I don’t own an external screen to see, I know it starts and turns on everything but not the screen and stays like this