Typically when I see something behave like this (sign of power for a brief moment, then off) it is cutting power to itself to prevent damage due to a short circuit. Something inside was likely hit with water and has shorted out. Unfortunately, I can’t really say what without pulling it apart and testing components. If you are lucky, you will open it, find one component with corrosion growing on it, fix/replace it, and it will work, but when something has that much water run over it I tend to see multiple parts damaged.