Support Screen not working/ Mysterious liquid

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http://androidforums.com – Hello, A couple of days ago the screen on my GT-19300 G3 began flickering and then died. When I took of the back cover I found liquid inside the back cover and on the battery. I don't think it's water because it seemed oily and the phone never got wet. The phone is not covered by warranty since it is an international phone bought in the US. I would like to try and repair it myself but I'm not sure where to start. My best guess is that the liquid was leaked from the LCD. Is this possible? What parts do I need to replace? Thank you. (General)