Hi - Apologies if I missed following this discussion, I have a similar issue.
Previously in my Mumbai acco, the dac would stop working every time I switched on the fan / turn the fan regulator / switch on the tube. Now, in my Pune acco I am facing the same issue, though not when using all the switches, only when I change the fan speed via regulator (Step type regulators)
My listening setup is in the living room and in both Mumbai/now Pune it is on the same line as other electrical items in the living room. This issue is only when using switches/regulator in the living room, there is no issue when operating appliances/other electrical items in other rooms.
Unfortunately I cannot draw a dedicated power line to my listening equipment, since I live in rented acco.
If I have followed the discussion correctly the only solution is a dedicated power line ? Please can someone confirm if a isolation power transformer will help, and also recommend a good brand in Pune.
Regards,
Kapeel