Tivo Mini - high frequecncy noice (buzz/hum)

I'm trying to determine if this is normal or if there is an issue with my new Tivo Mini.... Just got a new Mini for XMas and its pretty awesome. However, it produces a high pitch frequency (buzz / hum). It's not super loud, but can be heard as far away as 15 feet. This is for the bedroom and its pretty annoying. I was hoping my wife wouldn't hear it, but she already has....



I did read on this forum that Moca can cause this, but I disconnected the coxial cable as a test and it did not change anything.



Any thoughts?



Thanks