If it is AC/AC then this is just a transformer (no doubt with the obligatory internal thermal fuse).
20.4A at 24V is 500 watts, that is quite big (and expensive).
The internal fuse "may" be replaceable.
Are you sure its the power-supply that's gone and not something to do with the lights and wiring?
Will txt you.
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates