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Lenovo Yoga C740 wrong BIOS Version and failed BIOS update

2020-01-19, 8:57 AM

I am trying to update my bios, I have downloaded the BIOS Update for Windows 10 from Drivers & Software website:
https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/yoga-series/yoga-c740-14iml/downloads/DS541349

 

After installing to C:\BIOS\BNCN35WW\, I ran the BNCN35WW.exe. The Insyde H2)FFT v6.20 application run, and a pop up window stating "This BIOS is not for your Notebook PC". The application close itself after clicking OK on the pop up window.

 

In the application it show

Current ID: CometLake

Current Version: BNCN16WWT07

 

New ID: Yoga C740-IML

New Version: BNCN35WW

 

In the System Information of from Windows 10

System SKU: Lenovo_MT_81TC_BU_idea_FM_Yoga C740-14IML

BIOS Version/Date: LENOVO BNCN16WWT07, 22/5/2019

SMBIOS Version: 3.2

Embedded Controller Version: 0.16

BIOS Mode: UEFI

 

I google searched the version BNCN16WW and found it to be a version for Yoga S730. 
https://support.lenovo.com/cr/en/downloads/ds541363

 

May I know what is the problem? How can I update to the correct BIOS version? But my laptop is running without a problem, I got my laptop second handed and would like to clean everything.

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Re: Lenovo Yoga C740 wrong BIOS Version and failed BIOS update

2020-01-19, 11:41 AM

Welcome to Lenovo Community

Regarding the name of the BIOS for S730 there might be a typo on the page on the support site you've linked to. Take a look at the BIOS package name as well its readme file in the download links on that page
https://download.lenovo.com/consumer/mobiles/bRcn16ww.exe
https://download.lenovo.com/consumer/mobiles/bRcn16ww.txt

The readme file on the download page has the same name bRcn16ww instead of bNcn16ww the package you've noted. Most likely it's an annoying typo.

I don't know what causes the issue with BIOS upgrade. Try to do that via previous BIOS version(s):
https://download.lenovo.com/consumer/mobiles/bncn25ww.exe - BIOS update package
https://download.lenovo.com/consumer/mobiles/bncn25ww.txt - readme

https://download.lenovo.com/consumer/mobiles/bncn33ww.exe - package
https://download.lenovo.com/consumer/mobiles/bncn33ww.txt - readme



x220 • Gobi 2000 3g | hdd, msata ssd, wwan, wifi, gps -- unique hand-made config
ThinkPad 25 Special Anniversary Edition. #Retro. Signed by D.Hill
T470p | X1 Carbon Gen3 | Miix 2 10" | Yoga Tablet 2-1050F (Android) + BT Keyboard
ThinkPad Stack • 2.4/5 Wireless Router, HDD 1 TB, BT Speaker, Power Bank, Mobile Projector

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Re: Lenovo Yoga C740 wrong BIOS Version and failed BIOS update

2020-01-19, 12:02 PM

Hi,

The two link you gave with BNCN33WW and BNCN22WW have the same issue as shown.

 

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Re: Lenovo Yoga C740 wrong BIOS Version and failed BIOS update

2020-01-19, 12:25 PM
The only assumption about the source of issue I have is an index T07 in the laptop BIOS version name. What is it? Where has it appeared from? I can't explain that, sorry.

Probably, standard Insyde flash tool, either Windows or EFI, and the BIOS image extracted from the update package could help or the setting for that to not check out current BIOS version. But it's your own risk.



x220 • Gobi 2000 3g | hdd, msata ssd, wwan, wifi, gps -- unique hand-made config
ThinkPad 25 Special Anniversary Edition. #Retro. Signed by D.Hill
T470p | X1 Carbon Gen3 | Miix 2 10" | Yoga Tablet 2-1050F (Android) + BT Keyboard
ThinkPad Stack • 2.4/5 Wireless Router, HDD 1 TB, BT Speaker, Power Bank, Mobile Projector

Do it well, worse becomes itself

Communities:   English    Deutsche    Español    Portugues    Русскоязычное    Česká    Slovenská    Українська   Moto English

Browser Search to find the answers in the Lenovo and Moto Community
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