So this morning I turned on my macbook pro. It booted up fine, but when I tried to type anything, maybe half the keys on the keyboard don't work. Some will even seem to be stuck down, randomly stopping and starting. My roomate had been previously using it with me (watching south park and typing on msn). So, as far as I know working when he turned it off. It sat in my room unused overnight. The guy who answered my call about the warranty and repair asked if I had spilt anything on it after hearing it was a keyboard issue. Months ago I did spill some water on it, but after flipping it and drying it off things seemed fine for months. Is there anyway I can check if the current issue is from water damage (the mac store is a good distance away, and I have no car to get me there)? I really hope this is covered by the warranty, but im worried even soemthing left from the spill months ago might void the warranty. How can I tell if my keyboard will be covered by warranty before I pay money to get to a store and have a technician look it over? Specifically, what evidence of water damage should I pray isnt on my keyboard?