I've made some progress on my United Brazil. When powered on the lights now come on!
However when pushing the reset button nothing happens. When adding a coin or manually triggering the coin door nothing happens.
Looking at the schematic https://bingo.cdyn.com/machines/united/brazil/resources/schem-brazil.png
Since the voltages coming off the transformer seem to be ok, I'm thinking I need to look at the reset switches on the far left of the schematic. Does that sound reasonable?