Fortunately this bench power supply turns out to be very much like any number of similar 30V, 5A units, with repair videos and schematics available. While [Tahmid] doesn’t detail his ...

A benchtop power supply is a key thing ... for converting any ATX PSU into a usable bench unit. The design features banana plugs outputting +12V, -12V, +5V, and +3.3V, with all outputs ...