The power supply is dead, you can see the parameters and the extent of the damage in the pictures below. Visible dark spots were created due to the melting of a thin layer of black sponge, which was the "padding" for PCBs. I know that it is the cheapest to buy another such power supply with given parameters, but maybe someone has knowledge and experience and will help in the repair of this miracle.
Maybe somebody will someday put the schematic of this Soundcraft power supply, it's worth expanding the knowledge base. Greetings!
