Computer turns on, but the screen stays black

Ok, so I have an Acer Aspire Notebook. It less than one year old and I have already had the hardrive replaced twice, under no fault of my own. Yesterday I spilled a tiny bit of liquid onto it, I believe it had only gotten on the outside. I do not believe that it got onto the keyboard. Anyway, it was fine and worked perfectly. Then I left it sitting unplugged for a few hours. It normally hibernates when I do this so I was not worried. When I returned I found the laptop with a dead battery and I proceeded to plug it into an outlet so it would charge. After I plugged it in I tried to turn it on and it did come on, but the screen remained black. Could I fix this myself or do I need to take it to a professional?