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zma
Fanfold Paper
Posts: 10
Registered: ‎05-08-2016
Location: IT
Views: 1,289
Message 1 of 11

700 15ISK - Bios update E5CN51WW kills WLAN

Hi all

I have a 700 15ISK laptop, with default E5CN19WW bios revision.

 

When i have upgraded the bios to newer E5CN51WW revision the WLAN ceased to work. The device

shows allright into the device manager, the WLAN icon shows into the tray but NO DETECTION OF ANY WLAN AT ALL.

 

This bad issue is verified with default Windows 10 home edition in full UEFI mode and with

windws 7-64 in full legacy mode.

 

When i have reverted bios to the E5CN19WW revision the issue was not verified. eg : the WLAN woks allright.

 

note that my laptop has the realtek 8821AE  WLAN not the intel one. 

 

Some one can explain me what's going wrong with E5CN51WW bios ?

 

kind regards

 

 

 

zma
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Posts: 10
Registered: ‎05-08-2016
Location: IT
Views: 1,146
Message 2 of 11

Bios update E5CN52WW kills WLAN

Same issue with E5CN52WW. This update disables WLAN 

I have reinstalled the E5CN19WW and the WLAN is reverted to OK.

What's going wrong in lenovo ?

Why a bios update causes this hardware malfunction ?

None can reply or anyone has experimented this issue ?

My mode is exactly 

700-15ISK - 80RU003AIX

 

Other issue on this model : the keyboard sometimes miss a stroke, i mean that, sometimes, pressing a key, simply, does nothing !!!!! (same results on E5CN19WW and E5CN52WW )

This is unacceptable on a computer in this price level Smiley Sad  

 

 Lenovo, please fix those issues.

 

kind regards

 

 

 

 

isciadmin
Paper Tape
Posts: 3
Registered: ‎11-25-2016
Location: TH
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Message 3 of 11

Re: Bios update E5CN52WW kills WLAN

Me too.

lukalek23
Blue Screen Again
Posts: 8
Registered: ‎02-08-2017
Location: RS
Views: 956
Message 4 of 11

Re: 700 15ISK - Bios update E5CN51WW kills WLAN

zma hi, I also have some problems with bios update (altough it's with 56 version) so can you tell me how did you reinstalled the default version of bios? thnx

zma
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Posts: 10
Registered: ‎05-08-2016
Location: IT
Views: 918
Message 5 of 11

Re: 700 15ISK - Bios update E5CN51WW kills WLAN

in the bios startup screen select the option to downgrade the bios, after that install the E5CN19WW bios version.

 

It's a shame that lenovo aren't adjusting those issues on a pc of 1000 eur price.

 

Wlan not working anymore with bios updates and keyboard miss keystrokes !

I have made many tests with keyboard and , i am sure that, the driver/hardware

is so buggy that sometimes the keystroke is not detected - also the repetition rate of the keys lags randomically. same issue with trackpad, moving the finger in round pattern the cursor sometimes will jump to a wrong position !

The round pattern is broken by a randomic issue !

 

 

 

Administrator
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Location: SK
Views: 893
Message 6 of 11

Re: 700 15ISK - Bios update E5CN51WW kills WLAN

Hello and thank you for bringing this to our attention, I have reported this and requested the issue be looked into.  For this purpose it would help us to know which Wireless driver is also installed on your systems, if you could post this information it will hopefully help us moving forwards to a resolution.

 

Thanks in advance.

 

 

Andy

 

English Community Leader
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zma
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Location: IT
Views: 868
Message 7 of 11

Re: 700 15ISK - Bios update E5CN51WW kills WLAN

Hi, the computer model is 80RU003AIX

the WLAN is

Device : Realtek 8821AE Wireless LAN 802.11ac PCI-E NIC

ID Hardware : 

  PCI\VEN_10EC&DEV_8821&SUBSYS_A81417AA&REV_00

  PCI\VEN_10EC&DEV_8821&SUBSYS_A81417AA

  PCI\VEN_10EC&DEV_8821&CC_028000

  PCI\VEN_10EC&DEV_8821&CC_0280

driver date : 13/10/2015

Driver version : 2023.19.831.2015 (as show by windows on device driver properties page)

kind regards

amz

 

 

Administrator
Administrator
Posts: 6,815
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Location: SK
Views: 849
Message 8 of 11

Re: 700 15ISK - Bios update E5CN51WW kills WLAN

Had you tried the latest WLAN driver with the BIOS update? Perhaps updating the WLAN driver before the BIOS might be an idea; it's from September 2016.

 

Version; 2023.37.0616.2016
http://pcsupport.lenovo.com/sk/en/products/Laptops-and-netbooks/700-Series/700-15isk/80RU/downloads/...

 

Andy

 

English Community Leader
Please remember to come back and mark the post that you feel solved your question as the solution, it earns the member + points 
Did you find a post helpfull? You can thank the member by clicking on the star below their post awarding them Kudos
 

Please don't ask me questions by Personal Message; questions belong in the forums.
 

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Former Employee
Posts: 1,664
Registered: ‎09-16-2014
Location: US
Views: 816
Message 9 of 11

Re: 700 15ISK - Bios update E5CN51WW kills WLAN

Zma,

 

Have you installed Lenovo Utility and Lenovo One Key Optimizer? Lenovo Engineering reports that when Windows 7 is run without these programs on some systems, key features will fail.

 

Thank you,

zma
Fanfold Paper
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Registered: ‎05-08-2016
Location: IT
Views: 784
Message 10 of 11

Re: 700 15ISK - Bios update E5CN51WW kills WLAN

latest driver installed downloaded from 

http://pcsupport.lenovo.com/it/en/products/laptops-and-netbooks/700-series/700-15isk/80ru/downloads

The issue arises also with windows 10 pre-installed and with windows 7-64 bit with latest drivers. Tested twice

kind regards

 

 

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