Honeywell HE300 Board Not Powering On

So I'm installing the HE300 on two air handlers that were retrofitted into a house with radiant hot water heat.

I have the unit installed, Humidistat wired up, water & drain installed. Unit is setup with C & G wired to the Air Handler board w/ default settings.

When I plug unit in, the Humidistat is getting power, however, no lights on the board show even when in test mode or when jumping the U wires. I saw that someone said their unit failed due to transformer failure. Both of these units are new and neither shows lights when testing.

Any thoughts before I send them back to supply house?