I had the same problem. It was hardware related (display issue).
Eek. Has Neural commented on anything that could cause this? Or just unpredictable failure? That sucks
This issue is extremely rare and usually due to using an alternate PS other than OEM. I would definitely email support@neuraldsp.com so they can log and provide resolution
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Never used anything but an OEM power supply. Has anyone had any resolution from Neural?
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the only times I’ve seen this issue reported it had to be replaced at a repair center.
Hopefully Sweetwater will take care of all that for you.
have you contacted Support@neuraldsp.com yet? (they’ll probably direct you thru SW tho)
@xush Thanks! 
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This particular issue has nothing to do with power supply.
Soy usuario de QC hace un año y medio aproximadamente. Tengo el mismo problema hace unas semanas , siempre he usado la fuente de alimentación original. Estoy viendo de enviarlo al servicio tecnico, mi QC está fuera de garantia porque la compre en una tienda que no es ficial de la marca.
La funcionalidad del flujo de audio esta ok, puedo acceder visualmente por medio de PC via USB a Cortex Control.