In another post that I can not find, there was talk of feeding the DAC Boss and
Rasp3 from pins 1-2 and 15-16 of DAC Boss.
I built a PSU with an LM350T, this generates 5V and 3Amp, enough for both.
Connected to HDMI and powered from the DAC I see the yellow ray that indicates error in the source, even more, at some point blinks the red power led of the Rasp.
If you feed from the Rasp, everything works correctly.
I do not know if it’s worth building an independent source for the Boss and feeding it by intervening the plate as the manual says.
It will be necessary?
Regard
Daniel