The miner does power up with green lights at the back and an amber light on the front -- could this still happen if it was underpowered?
Again, I don't have much experience testing with these sort of edge cases. My PSUs are all HP server power supplies that do auto switching, so even with the 120V i have at home (vs the 220 I have in the mine), I can test them and they fire up.
I have a spare AUC cable at home and a Pi - i will test to see if it shows up with no miner when I get off work in a couple hours.
Do you have an ATX PSU you could try to hook up to the miners to see if that worked?