? about hum from tv

[Scytale]

Hey time to put some of you smart guys to the test.

My tv lately (or maybe I just started to notice it) is humming through the speakers. What I was able to narrow the hum down to is it will only hum on the imputs that are hooked up to an analog audio/video signal. For the tv and the ps3 I have Component signal running to it.

I was playing around with it and when I pulled out the audio jacks from the plugs the hum stopped, and when I'd go to put even 1 back in (either white or red didn't matter) the hum returned. It didn't make a difference if the equipment was turned on and sending signal to the tv or not when I tested it. I got hum from the cable box which was on and then got hum from the ps3 line even though it was turned off.

Any ideas? I get no hum on the speakers from Digital signals. I have HDMI going to the tv for the dvd player. If it's an analog vs. digital thing I can fix that easily enough with the ps3 but I don't think Comcast has receivers that support HDMI.

[Sykes]

It's almost certainly a ground loop problem, which are kind of a pain in the ass to fix. Most likely you'll need to buy a ground isolator of some type. Check this article for some tips:

http://forum.ecoustics.com/bbs/messages/34579/180767.html

... if you do a Google search for "ground loop" you'll come up with a whole mess of other articles to check.

[Scytale]

It's definatly electrical interference of some sort, and it's coming from the ps3. I turned it's power off entirely and the hum was still there, but when I un-plugged it the hum stopped. I had it in the same power strip with everything else so I said heck let's move it to another plug see if that does anything. Hum came back. Not sure if the plugs I put it on are on the same breaker can't be too sure of that.

It's not just an analog component issue though. I unplugged the component totally then connected the ps3 to the tv using hdmi. Hum! Somehow, regardless of if I have the ps3 on or not...some action of the power just flowing through all the stuff is making it hum. $15 for that ground isolator from radio shack doesn't sound too bad I'll have to give that a try. Or worst case disconnect the ps3 when I'm not using it.

[Halon50]

How far can you isolate the PS3 from your audio equipment? Could also be some low-level EMF from the PS3's power supply.

[foxfai]

It could be something that was recently plugged in with the PS3 outlet.　Ｏｒ　ｓｏｍｅｔｈｉｎｇ　ｉｎ　ｔｈｅ　ｗｉｒｉｎｇ　ｔｈｒｏｕｇｈ　ｏｕｔ　ｔｈａ ｔ　ｓｐｅｃｉｆｉｃ　ｃｉｒｃｕｉｔ　ｗｉｔｈｉｎ　ｗａｌｌｓ．