This? I had this issue, Thomann send my QC to Neural directly, cause they guess it’s a hardware problem. (i had this issue both, with the Stock Power Supply and with the MyVolts Power Supply)
If this is caused by changing the Power Supply and to little power input or fluctuating power delivery i find this highly frustrating. Still a bummer, that Neural doesn’t built the power supply into the unit, like Kemper, Helix or Fractal