If possible I'd try to isolate the issue to the Pi or the HAT or the power supply. Can you disassemble and try powering on the Pi only with a USB power supply? That would be a place to start. Also if you have a multimeter you can check the voltage coming out of the Pi2AES power supply.
If anyone's in the same predicament, but only wants to spend $20 on a lil-better-than-stock-smps PSU, take a look at this forum-approved option from Amazon:
Read these "rules" AND introduce
yourself before your first post
Being true to what the artists intended
(opinion / entertainment piece)
Comments on Profile Post by caute