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controller board is not the problem, correctly outputs 3V3 (when testing independently)
when the controller board is connected and the PD is supplied with a 12V, the 3V3 voltage rail is supplied ~1.8-1.9V (with test points both on the pd and cb)
it was suspected it may be the CB connector, however, the 3V3 on the CB is also effected when testing
01-08-2023
resoldered a new connector to the PD board
the 3V3 correctly outputs and 5V voltage line outputs 5.5V
Input power supply: 12V, 0.042A