lenovo screen black

Hi, I spilled water on my Lenovo Ideapad S145 15AST and dried it. It now work well except that the screen in dim. What could be the problem? How can I fix it?

I got my lenovo ideapad 100 four days ago.Yesterday I was really bored to shut it down so I just closed the lid now when I opened it I can hear sound but It doesn't show anything on screen.I tried letting it run out of battery and then opening it again also I tried if I clicked the "close...