Audio jack hum early 2008 MBP

[gonnabuyamac]

k, this is a random issue. While listening to headphones on my MBP, I have noticed a low hum when my computer is plugged in. However, when I unplug my computer, it goes away.

And here's the really weird part. When my MBP is plugged in, and I touch any metal part of the computer, the hum goes away. But, if I take my hand off the computer, the hum returns.

Could there be some sort of power leak, grounding issue, or something weird going on with the computer?

 

[Consultant]

Sounds like ground loop issue. Probably will go away if you use the 3 prong power adapter.

 

[Craigger]

k, this is a random issue. While listening to headphones on my MBP, I have noticed a low hum when my computer is plugged in. However, when I unplug my computer, it goes away.

And here's the really weird part. When my MBP is plugged in, and I touch any metal part of the computer, the hum goes away. But, if I take my hand off the computer, the hum returns.

Could there be some sort of power leak, grounding issue, or something weird going on with the computer?

I had this issue, but it would hum any time I used the trackpad.

after 3 replacements, I am now typing on a replacement unibody.
I like it.

 

[gonnabuyamac]

I had this issue, but it would hum any time I used the trackpad.

after 3 replacements, I am now typing on a replacement unibody.
I like it.

You got it replaced for that issue?

 

[SchneiderMan]

You got it replaced for that issue?

they will replace anything you don't like trust me..

 

[Craigger]

You got it replaced for that issue?

I took it into apple twice for a fix, and on the third try I called in. They said instead of sending me a replacement they would be sending me a "new" computer with 250gb instead of 200 gb, and 4 gb of ram instead of 2.


Sweet deal seeing as I essentially paid $1550 for an upgraded unibody MBP