Thanks everyone for the support. Thinks look really tricky with invidious, and I’m thinking to stay with the public instances :)

Wow, thanks a lot for the tip! I’ll have a look at them. I tested with an incandescent bulb in series with the power supply. It lit up brightly, indicating a short circuit. I also tested for continuity directly at the power cord, which confirmed the short. I tested the transformer apart from the circuit, and it’s working fine.

Great article!