I had same simptoms recently.
Pull out smps, measure vdd to gnd resistance if around 2ohms thats bad, you have a short
?
Measure ESR of tantals on vdd line of PCM1804 if any of the two shows over 60 ohms welcome to the club, you have shorted PCM IC,
?
Unsolder it and order new ones
Ivica - YU1QRP