My waterbottle opened in my backpack, dousing my (closed and off) MacBook with 1/2 liter of water. I waited about 52 hrs before turning it on, heated it a little and used the blow drier. I let it drain. When I turned it on, everything was fine except the screen was really dark. I could still see what was on the screen, but it was like the background light was off. I tried increasing brightness, but nothing helped. Did the light short circuit? Can that be replaced? I bought the expensive $250 Apple Care warranty, will that cover it if I don't say I spilled h2o all over it?