ASIC PSU won't power on

I managed to snag 2 Avalon 1246 miners and have been working on the power setup in the garage with no luck thus far. Wondering if anyone here could shed some light for a newbie like myself =)

I’ve got two circuits at 240v and 20amps, running to their own nema 6-20 plug socket. And I’ve got a nema 6-20 to c-19 power cord running to the PSU. But it won’t turn on. No lights no nothing. (can confirm there’s power in the socket and the breaker is on)

Wondering if I have the wrong circuit set up, power cable, or just some faulty mining rigs…