In three out of four cases of spills on these machines, replacing the upper case solves the problem. Note the plastic covering on the bottom of the keyboard, this protects the logic board pretty well. If you saw liquid actually on the logic board you may have greater problems. If it is completely dried out you can try starting it up. If the only problem is with the keys you may be in luck and a top case replacement may be all that is required. If not I would contact my insurance agent and see if you are covered.