Hi, I see things like this all the time in my shop, however 99% are totally ruined. You see the instant any water and the printed circuit board and components leads come in contact with water there is an instantaneous chemical reaction, and that alone is bad, bit if the unit is ON, at the time of water contact, current goes all which ways and gets to parts it should not do so normally as it flows through the easier path, the water, this then destroys the delicate IC's inside, and results in a totally wrecked thing. I have stripped them down, cleaned them off, gone over them, even with,some my own, that I have got to, within seconds... but no matter what you do short of replacing every board and device again, it simply isn't a practicable option I am sorry. Sometimes you get lucky, but if ever it gets a proper "Dunking" and water gets to the circuit boards, it usually is a total write off.