Thank you all for your replies; I was able to narrow down the issue to the actual PicoPSU.
Ironically, it was a legit PicoPSU, not a clone; and the clone I purchased works like a champ. Audio is good, overall the system is stable and I get the right voltage out of the pins.
@Daedalus my -5 was the -12V pin; clearly that PSU was shot because it was not giving me the -12V at the connector
After the swap of the PSU, everything is working fine now; I am very happy. Thanks again!
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