Sony HAP-Z1ES HDD audio player. FAULTY ?????? a new owner

I’ve had one for 3+ years, no hum issues at all (using RCAs, not balanced). Solid and reliable so far. Possible that’s why it was sold? Do you you have any recourse with the seller?

Long time owner. Should be silent. There is a fan in there but it's quiet. 

Try a 2 prong plug not 3 (w/no ground). 

The internal power transformer should most definitely NOT be making any audible noise.
I would not even waste time opening it up to look at the transformer if you have an option to return, eBay, Audiogon ,dealer etc.
If a private sale then you should have powered it up before purchase?
Lot of happy satisfied owners here and this is not normal.

If you have no option to return, open up the case and check the transformer mounting, loose screws , connections etc( obviously while powered off!).

Good luck but not sounding good tbh

I own two of the Sony HAPZ1ES and both are dead quiet. One sits on the rack right next to me and I can’t hear any noises coming from the unit at all.  If you bought it used, I would send it back as it isn’t right.