Getting closer with the adapter board:
5ebd6126-06ee-4b2f-af13-06e372c1de4d-image.png

One Item I've just started to look into, but haven't yet worked out is enabling the PDB without the SBC attached. @AJ-Quick unsure if you ran into any issues disconnecting the SBC power cable (4-pin Molex 8981 connector) - initially on power up all power LED status lights are on, and the 5V/12V power supply is outputting voltage. After a few seconds, the 5V/12V power supply cycles between on and off. I wonder if the 5V/12V power supply has some sort of minimum load?

I believe I've got the correct set of pins on the PDB getting power, simply having only the power connector connected to the SBC (no hard drive I/O or power, no display) allows it to power on correctly.

Video of issue: https://www.youtube.com/watch?v=GKUwO8F4w1w

Edit: SBC draws 2A on the 5V side. Thats a start.

@Shoki
Have you done a PID tuning for the hotend with the fan running full blast? In another thread, I read it was running at only 70% during PID tune...