Nobody can say what is or might be damaged based upon that almost zero information. Numerous reasons could say damage or not. You have two choices. Just keep replacing good parts until something works or is found defective. Or start by using a multimeter and one minute of labor so that others know what you have.
Many make the mistake of assuming the PSU is the entire power system. PSU is controlled by a power controller that decides when to power on, when CPU can execute, how to setup peripherals, and when PSU powers off. Only way to say what is and is not working means that one minute of labor with the meter. Or just start buying replacement parts.
The normal manufacturing process is to wash the motherboard maybe in a dishwasher. Water is not harmful to parts as long as the board is dry when power is applied.
did you miss the pics with the hole burnt in the mobo ?
