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RFI from steel TV bracket?

Yesterday I installed a new TV on a steel wall-mounted extendable bracket between all my electronic components.
I now have a low hum/buzz from both speakers on all sources....even with the preamp on mute?
When I switch the preamp off.....the hum is still there.
The only way to remove the hum is to switch the amps off?
I tried grounding the steel bracket to the preamp and then the amps without success.
The previous TV was in the same location but sitting on the shelf.....not a steel wall bracket.
Any help would be dearly appreciated?
128x128halcro

Showing 1 response by jea48

jea48
2,944 posts
 
Yes I unplugged the TV and also tried it in different GPOs.....even a power conditioner. I even disconnected the 'sound-out' of the TV from the preamp. Hum still there.
11-13-11: Halcro


Want to rule in or rule out 100% the hum is being caused from the metal bracket? Take the TV down from the metal TV bracket, set the TV in the middle of the room, and then check for hum...
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