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4 Posts

05-31-2015

Germany

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  • Posts: 4
  • Registered: ‎05-31-2015
  • Location: Germany
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  • Message 1 of 3

T550 coil whine noise

2015-05-31, 19:59 PM

Hi

 

Just received my new lenovo Thinkpad T550 with a Samsung 512 GB SSD and in a silent environment it makes a strange noise (fans are off - so this is not the problem):

 

https://dl.dropboxusercontent.com/u/46679366/Lenovo%20sound.m4a

 

This becomes quite annoying when you work e.g. at night.

 

After doing some research in this forum I found that this is the "coil whine bug". 

 

I just tried this registry change mentioned in a different post and it seems to work (however power consumption will go up) after rebooting the machine:

 

reg add HKLM\System\CurrentControlSet\Control\Processor /v Capabilities /t REG_DWORD /d 0x0007e066

 

Undo:

reg delete HKLM\System\CurrentControlSet\Control\Processor /v Capabilities /f

 

However this cannot be the solution. I thought only older models are affected and now I am quite disappointed that even the latest model has these issues.

 

Best

Kilian

 

Posts worth to check out: 

 

 

 

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65 Posts

04-27-2013

Greece

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  • Posts: 65
  • Registered: ‎04-27-2013
  • Location: Greece
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  • Message 2 of 3

Re: T550 coil whine noise

2015-05-31, 21:12 PM
I have got a similar problem with the 90W AC adapter...it whines a lot.

Now that I have installed two HDDs in my T520 I can't hear it that much but still at night it surely is annoying. It's moreso the frequency of the noise, rather than the volume.
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2 Posts

06-04-2016

Denmark

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  • Posts: 2
  • Registered: ‎06-04-2016
  • Location: Denmark
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  • Message 3 of 3

Re: T550 coil whine noise

2016-09-07, 20:41 PM

I had this noise too. Very disturbing when in otherwise quiet environments. The solution was to disable the CPU Deeper Sleep system setting using the ThinkVantage Technologies Power Manager 6 for Windows 7. Download here: http://support.lenovo.com/dk/en/downloads/ds014924

 

 

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