Did the coffee have sugar in it? I know that seems a strange question, but sugars can accelerate the damage to some components and electrical tracks on the circuit boards (Beer is one of the worst if left).
I would suggest getting a professional to look at it, and soon. If the tracks get badly damaged (which can also be related to how long you leave things), you may end up throwing the whole thing away as unrepairable. But don't panic just yet, get it seen to.