My laptop turns on, but doesn't appear on the screen

Permission to ask

Acer aspire one 722

How do I fix my netbook?

I turned it on but nothing appears on the screen. Also usually if the laptop is alive the indicator lights are on 2, the 1st light (blue) and the 3rd light (orange). The middle one (2nd) is the charge indicator light. But now, only the blue one is on.

Chronology:

Last night I was opening tele web and wa web in chrome, suddenly the laptop froze, I studied it for a few minutes, but it was still the same. Then I forced shutdown it via the power button. After that, I left the laptop for a while, now when I want to turn it on again it's like this:(. Cann't appear on the screen

Please i need a solution

There are my assignment files too:(