Behringer UB mixers SPSU2 power supply noise

[diydidi]

Hi I have a UB1832FX mixer for repair
On one of the XLR outs, the one closest to the SMPS, there is a high freq noise. If i move my finger along the wire that connects smps to main board, the sound changes.
I have checked ESR of all caps. All voltages read fine with little/no ripple. I have tried a ferrite bead on the connector cable with no luck.
I have checked all secondary diodes.
Any ideas?

[diydidi]

Nevermind. Found the culprit

[Jazz P Bass]

And the culprit was.....?

[g1]

And the culprit was.....?

Yes, please feel free to share information here as freely as others share it with you .

[diydidi]

I thought it was the power supply. Turns out it was an opamp after the right channel main fader, that was noisy and had bad psrr for some reason. IC39.