Dared MP5 DAC-amp. Lights on, nobody home

Just bought a used Dared MP5 amp: a DAC, Headphone amp, and ~10Watt tube amp all rolled into one. It is similar to the FatMan iTube units. It did not come with a manual, but I have downloaded a FatMan manual and there isn’t much help there.

It powers up and the tubes light up and warm and everything seems OK. However, I cannot get sound out of headphones or the speakers.

Anyone work with or set up one of these before? Any idiosyncrasies with the amp or the set up or firmware that must be down loaded in order to get it up and running? Any weak points in the circuit that are worth checking out that anyone is aware of?

I appreciate any help or guidance that anyone out there can give.

Thanks,

CN