amplifier noise from Samsung LCD

[DamageInc]

I recently purchased a new Samsung LN52B750. When I have it plugged in on the same wall as my Denon AVR1803 receiver, I get a hum in my stereo speakers. It is not going through the line-out; I can unplug everything from the TV except power source and the hum is still there. But if I use an extension cord to plug the TV in on a different circuit, the hum goes away. Obviously I can't have an extension cord running across my living room, so I need another way to fix this issue. Is there a filter that I can buy to eliminate this? Is this a common issue with this TV?

thanks...

 

[TLS Guy]

I recently purchased a new Samsung LN52B750. When I have it plugged in on the same wall as my Denon AVR1803 receiver, I get a hum in my stereo speakers. It is not going through the line-out; I can unplug everything from the TV except power source and the hum is still there. But if I use an extension cord to plug the TV in on a different circuit, the hum goes away. Obviously I can't have an extension cord running across my living room, so I need another way to fix this issue. Is there a filter that I can buy to eliminate this? Is this a common issue with this TV?

thanks...

This is a classic ground loop. There is no filter for that. We need to know all of your gear and where everything is plugged in and to what, and which gear has three pin and which two pin AC mains plugs. We especially need full details of the hookup to any cable or satellite service. Some how you have a resistance between grounds.

 

[DamageInc]

Thanks for the reply. The equipment is as stated in first post, and I unplugged ALL other equipment and connections except the power feeds, and the hum was still there. No cable connection, no lines in or out, nothing.

What about eliminating the ground from either the amp or TV? Any risks with that?

 

[TLS Guy]

Thanks for the reply. The equipment is as stated in first post, and I unplugged ALL other equipment and connections except the power feeds, and the hum was still there. No cable connection, no lines in or out, nothing.

What about eliminating the ground from either the amp or TV? Any risks with that?

That will solve it. However the fact that using a different ground solves it, raises the possibility that the receptacle you are using is not properly grounded.

 

[Adam]

How would you eliminate the ground on the Denon? Does the 1803 have a grounding pin on the power cord? I ask because I haven't seen a receiver that had one before.