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17 Posts

01-18-2015

USA

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Centrino Advanced-N 6205 Wireless instability

2015-04-12, 16:59 PM

The system board in my 2 year old ThinkPad x230 laptop was recently replaced to solve a sudden loss of power problem.  [See postings in "X230 Sudden Power Loss" thread.]

 

Immediately after the warranty replacement of the system board, my Intel Centrino Advanced-N 6205 WiFi adapter developed stability issues regardless of whether attempting to connect at home, at work or on the road on either band.  Now the Internet Explorer "wait" icon just spins and spins sometimes and I eventually get an error message saying that the computer cannot connect to the website.  Refreshing the browser sometimes will access the web page.

 

I have already updated WIN 7 64-bit Pro, drivers, and the Lenovo Solution Center software.  The other computers on the home and work wifi networks (including two other Lenovos) are not experiencing the same problem.

 

Any software ideas on how to get the wifi adapter working properly again or is another trip to the repair shop inevitable?

 

Thanks.

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9605 Posts

12-27-2009

CA

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Re: Centrino Advanced-N 6205 Wireless instability

2015-04-12, 23:36 PM
How's the connection strength as reported in Windows?

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
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17 Posts

01-18-2015

USA

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Re: Centrino Advanced-N 6205 Wireless instability

2015-04-13, 4:11 AM

Cannot remember where to find numerical signal strength data in Windows, but clicking on icon in bottom right corner shows "excellent" signal strength (five bars).

 

Lenovo Access shows 80%-99% signal strength.

 

InSSIDer software shows -50dB signal strength with 70-144Mbps throughput.

 

Any ideas?

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17 Posts

01-18-2015

USA

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Re: Centrino Advanced-N 6205 Wireless instability

2015-04-14, 3:53 AM

Does it sound like a software or hardware issue?

 

Any help would be appreciated.

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17 Posts

01-18-2015

USA

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  • Message 5 of 6

Re: Centrino Advanced-N 6205 Wireless instability

2015-04-14, 5:43 AM

I ran InSSIDer utility scan again and noticed that my 2.4 frequency WiFi (the baby blue line in the photo below) was displaying a square wave signal with distinct peaks and valleys between -50 and -80 dB strength which might correspond with the pauses when accessing web pages.  My 5.4 frequency WiFi (the very faint green line) was very steady at about -50 dB and produced better results when I switched my x230 to prefer that frequency.  The only material setting difference between the two frequencies was the power management. 

 

Is it possible that the Windows or Lenovo power management profile/agenda is switching the 2.4 frequency radio on the Centrino chip on and off? 

 

Or that the two power management programs are both on and conflicting?

 

Link to image

 

Moderator note: large image(s) converted to link(s):  About Posting Pictures In The Forums

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9605 Posts

12-27-2009

CA

3311 Signins

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  • Posts: 9605
  • Registered: ‎12-27-2009
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Re: Centrino Advanced-N 6205 Wireless instability

2015-04-15, 16:09 PM
Does that behavior go away if you're running on the High Performance power profile?

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
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