General Question

flutherother's avatar

Why is my TV sound system buzzing?

Asked by flutherother (30158points) October 29th, 2015

I checked online and it seems the problem might be a ground loop.

The buzzing stops when I disconnect my CD player from the mains but it returns as soon as I plug it back in even if the mains socket isn’t switched on.

This problem happened quite suddenly. Can anyone explain it in non technical terms and suggest a solution?

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13 Answers

Brian1946's avatar

Does your CD player have a power (on/off) switch?

flutherother's avatar

Yes, it does.

Tropical_Willie's avatar

Does your CD player have a two or three prongs on the plug that goes in into mains??
It sounds like you have a “Bad ground” in the CD player.
You maybe able to add a ground wire to the CD player and connect to “Earth” on a water pipe.

flutherother's avatar

@Tropical_Willie It has three prongs. There are no pipes nearby. It was fine yesterday, I’m not sure what can have changed overnight.

filmfann's avatar

Yes, that loud, deep humming buzz is from a ground. It could be in the cord that plugs from the CD player to the system. That is cheaper to repair. What kind of plug does it have?

ARE_you_kidding_me's avatar

It’s usually caused by a ground potential (loop) You may try plugging the the cd player into a different outlet. You want all that equipment on the same ground.

flutherother's avatar

All appliances are three pin and are earthed and all are plugged into the same extension lead. Connecting the CD player to a different socket makes no difference.

ARE_you_kidding_me's avatar

Does it happen when only the cd power cable is connected? What happens when the audio cables are unplugged and it’s still plugged into the ac outlet?

Tropical_Willie's avatar

@flutherother It sounds like the ground lead inside the CD player has been broken, has the unit been dropped or jostled ? ? Even turned upside down ? ?

flutherother's avatar

@ARE_you_kidding_me With everything unplugged except the amplifier and the CD player I still get the buzzing sound.
@Tropical_Willie No the unit has not been moved or touched.
If I disconnect the CD player’s earth lead the sound stops but I don’t want to do that.

Tropical_Willie's avatar

@flutherother Let me repeat, “If I disconnect the CD player’s earth lead the sound stops but I don’t want to do that”. The ground wire is removed; that makes it buzz? Sounds like there is a short or wire broken inside the CD player.

flutherother's avatar

It’s only when the CD player is earthed that I get the buzzing sound. The CD player might have a broken wire but it wasn’t moved or jolted. I don’t use it much anyway so I have disconnected it for now.

ARE_you_kidding_me's avatar

@flutherother time to try a different one.

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