Since there has not yet been a response on point, I’ll chime in. I have owned a couple of quality Chinese DACs over the last 8 or 9 years. I think I’ve read somewhere a while back that what I suggest may apply to the Holo.
First, I have found quality control excellent and I’ve never had a problem. Quality Chinese DACs generally are spread out in larger cases than some domestic/European DACs making components easy to see and remove. Separate boards within the case each do specific things. So if there is a difficulty, correspondence with the factory, or rep, can usually identify the board that needs replacement. Generally the boards are easily removed and sent in for repair or replacement. It’s not a very big deal. Normally you remove 4 screws and unplug a board. In one case it was reported that the maker of my DAC sent out a new board and asked the owner to use the box to send back the board needing repair.
You need to be comfortable opening the case and replacing a board, though.
All of this is just my surmise as to what may apply to a Holo.