[EricVanWyk]

Can you please confirm that the 5V supply still works, but both the 12V and 24V supplies do not?

The three supplies are mostly independent, and only share a common reverse battery protection circuit. From a schematic view, there isn't a single-fault that affects 12 & 24 but not 5. That leaves us with double-faults, which I as a rule don't believe in, or layout faults, which are almost always swarf related.

Did you get some metal shavings in there? Did you short something externally?