Originally Posted by Mr Meridian
Sorry lads. Gary modified it and it doesn't work as it should. I think he should fix it, or take it back and provide a refund.

George

PS: Shaun has kindly elaborated on what I mentioned earlier. Do not mess around with earthing for mains level power supplies. It's potentially dangerous.

I don't think it's that risky to lift a ground on a superfluous ground that was added !!

Even though I'm personally not a fan of mucking with power supplies, a ground loop, like this, can happen with some legitimate sources. So you can't completely fault Gary for doing what was specified and could be (I'm not saying is) legitimately built. Legitimately built devices can cause these types of issues. I just don't think it was needed and worth the headaches it might cause.

I think the only thing Gary *could do* is offer to put it back to factory. And for a fee. But I think it's pretty low risk to lift the ground that the Oppo normally never had. To avoid that route. If anything, it will confirm the source of the problem. And Mark can decide what to do. Having a third party modify the power supply in the first place has risk too, but Mark didn't hesitate on that smile

I respect your caution because I don't know first hand what the mod exactly did.

But just adding a ground wire from chassis to earth can cause a ground loop. So I say take that part back out (closer to factory).

- Fiddler (IMHO)

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