Best posts made by ASen

@fcwilt Yes, just tested with the new PSU. Works again, Thank you for your help. This thread can be marked as solved.

@asen Tomorrow, I'll try in the lab with an 5A 30V Adjustable DC Power Supply. Should be okay to test with, I think. I'll post my findings/measurements.

@asen Good news, when plugged to the LAB PSU, the 12V LED lid up. With nothing plugged into it, their is a current draw of 0.1A. I've taken a temporary 24V-6.5A PSU.
ps: Yes, I know the wiring is not adequate, it was just for a quick test. When used with a PSU all my cables are crimped.
To do: Test it with the new PSU, if everything works as intended I'll write it.