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7 Posts

04-17-2010

Romania

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Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-17, 10:59 AM

Hi there!

 

I've recently acquired a brand new EDGE 13, 0197-6GG (Athlon Neo X2 L325 version). I was very disappointed that in Romania you don't supply the black matte version - only the glossy, but that's another story.

 

It is a great machine, and Windows 7 Pro 64bit runs great on it. However I am disappointed to find that there is some really annoying EMI interference (noise) - on the audio channel and some occasional distortion. It runs even when muted, on speakers and headphones.

I am an Electronical Engineer and IT Specialist and I am guessing that this might seem as a design issue, which makes it impossible to apply for warranty, right?

 

I would like to mention that my old 3000 C100 notebook has one of the clearest sound channels (absolutely NO noise or interference of any kind) I have ever seen, and that is an entry level laptop.

 

I am curious to find out if anyone else has the same problems - just mute your volume and put some headphones and try to listen for random hissing and noise.

 

I am waiting for some feedback.

 

Thank you,

Ovidiu Cotta

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13 Posts

04-17-2010

Denmark

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Re: Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-17, 16:17 PM

I have this problem too. Exactly as described.

 

I talked to the Danish Lenovo support that told me to get an adapter for the earphones which I haven't done yet. Actually I'm not really sure what kind of adapter he meant, but I guess the problem is a design problem as you suggest but more precisely has to do with my earphones jack being "three-ring" type and the input jack on the EDGE is supposed to be four-ring since it supports both mic and phones in one. I tried connecting my Nokia earphone/mic handsfree (cable) set and surely the noise was gone. The sound anemic and low though which might have something to do with the fact that I used my own earphones instead of Nokia's.

 

Hope this makes sense (I'm not an audioengineer ;-)

 

(my main reason for calling support was because of keyboard flex which was taken care of immediately by sending me a new keyboard (which has no flex)). 

 

I hate that this is my first post here. I actually wanted it to be one stating how satisfied I am with the EDGE. The keyboard is simply phenomenal and win7 is smooth and fast. 

 

(EDGE 13 AMD L625)

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5 Posts

04-17-2010

italy

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Re: Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-17, 18:20 PM

really unhappy...same problems with my bose headp...with only the battery the sound is better but **bleep** i spent a lot of money ...the other noise came from the left part of the notebook ..do you?

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10 Posts

04-06-2010

Seattle

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Re: Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-17, 18:41 PM

Yeah, I get this too.

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7 Posts

04-17-2010

Romania

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Re: Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-17, 22:53 PM

You can find the exact same problem on a lot of motherboards for desktop PC's, when trying to use the audio front panel connector. The explanation is that the audio circuitry on the motherboard for the frontpanel connector is printed next to some power supply phases to the processor, and that creates crosstalk. You can actually "hear" the processor draining more power, in a matter of speaking.

It is unfortunate that we have this problem, which seems to be a design problem, on a product marketed on the ThinkPad line. As I have mentioned above, my old 3000 C100, which is the lowest entry level ever made by Lenovo, has crystal clear sound.

 

I have tested it with Sennheiser HD212 Pro headphones.

About the adapter mentioned by you, I doubt that could help, because you can hear the EMI interference even on the Edge's speakers, in a low noise environment, with the volume completely muted, and even when loading Windows or in the BIOS, so it's not an adapter setting.

 

Again, I agree with you, I went for this laptop because it is the perfect balance for me (I needed something light and on a decent budget because I have spine problems) and Lenovo hasn't failed me yet in many years - I work with, recommend, deal and distribute Lenovo to my customers and have always appreciated their products - The Edge it is indeed a great product, but it is unfortunate that this is something that slipped by, especially on the ThinkPad line. After all, it is the small things that matter, right?

 

Looks like the saying is true (all over in the IT industry): "they just don't make things the way they used to..."

 

If you have some further insight, please post it here.

 

Have a nice day!

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7 Posts

04-17-2010

Romania

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Re: Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-17, 22:56 PM

Can you be more specific with "the other noise"? I'm not sure what you mean.

 

Thank you

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5 Posts

04-17-2010

italy

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Re: Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-18, 11:39 AM

a distorsion audio is a small thing ?...c'mon we are in the 2010 ... i repeat i spent a lot of money for a notebook that have a loud noise from the side left and an audio distorsion....do you work for lenovo? 

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7 Posts

04-17-2010

Romania

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Re: Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-18, 14:49 PM

No, I don't work for Lenovo, if I would have worked, maybe the audio distortion problem wouldn't have existed in the first place and we wouldn't have this conversation now. If you read my post once more, you can see that I've said that it's the "small things" that really make the difference, in irony.

 

The noise from the left part could be from the cooler, which is completely normal for any notebook/netbook. Also, in a quiet environment you can barely hear the hard drive, again, this is completely normal (Hitachi HDD's are pretty quiet, and that is OK).

 

Maybe we could hear an opinion from Lenovo on this post, I am curious to hear what they have to say.

 

I am curious to see if this design problem is present on the Intel line - they use a different system board for the Intel version. Anyone care to test?

 

Thank you!

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5 Posts

04-17-2010

italy

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Re: Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-18, 15:23 PM

ok  i think the sound i hear in the left came from the cpu\video ..i don't now but for me is too loud not normal..maybe i will call assistence...my money don'y have design problems thanks hi

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4169 Posts

11-20-2007

United States of America

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Re: Edge 13 - AMD - Hiss / Distortion and EMI Noise on Speakers and Headphones

2010-04-18, 16:57 PM

 


ovidiuc wrote:

Maybe we could hear an opinion from Lenovo on this post, I am curious to hear what they have to say.


Welcome to the forum!

While there are a few Lenovo employees in here helping out on a volunteer basis, this is not an official support channel with dedicated Lenovo support personnel assigned to it. Instead, this is designed to be a user-to-user support and discussion forum. You may or may not get an answer directly from one of the Lenovo employees as there are way more of us than them and all of them, even Mark, have full-time jobs doing other things.

 


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