Threshold 400A Grounding Problem

[Steve Elkerton]

I have owned this amp since 1978 or 9, during which time I always believed that the ground loup was caused by the connection of the TV cable to the rest of the system. I used a cheater plug so that the amp could not ground to the house electrical system. The amp has worked fine in my, and others', systems thus.
However, I am of an age when I am divesting, and wonder if anyone has any idea how to correct this gounding issue to aid my sale, or should I just sell it as is?
Thanks

 

[Zen Mod]

if nothing altered inside, just sell as is

ground loops are sorta common problem, solved with cheater wherever most effective

 

[Steve Elkerton]

Thanks. That's what I thought.

 

[PRR]

Don't connect to TV. Problem solved.

 

[Ben Mah]

Yep, it's the TV or cable. I had that problem. So I took the digital out from the TV using optical to a cheap DAC with optical digital input. Good enough for audio-video, and safety ground still intact. Problem solved.