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158 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

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  • Message 11 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-22, 16:04 PM

Would be handy if they told us what was in the BIOS update. I'm wary to install something before knowing what it does.

 

Lenovo support is non-existent unfortunately.

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11 Posts

10-20-2020

Greece

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  • Message 12 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-23, 14:34 PM

Hi,

 

I have the same issue for 1.5 months now, exactly the same picture. My C940 is currently under repair for this issue because the first time they could not fix it. Before I sent it in, I did all the updates, BIOS, factory reset, everything they told me to do from customer service and nothing. They took it in the first time and they changed the screen cable, which of course did not solve the problem. Now I contacted them and they will change the screen and motherboard. What bothers me the most is that so many people have the same issue and lenovo still does not know what seems to cause it.

 

I would not recommend this laptop to anyone. Worst purchase of my life. From the first week I experienced freeze screens, overheating to a degree I could not touch it above the keyboard, audio and microphone drivers disappearing. Shame on Lenovo for this model seriously. I am without a laptop for 1.5 months.

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7 Posts

10-17-2020

Turkey

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  • Message 13 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-23, 17:33 PM

I'm done with Lenovo..

 

Today i returned it to reseller, with a lot of money loss.. Return is not an option after months, but my reseller is a kind person and he knows my troubles with c940 from beginning. 

 

So, it's time to leave community, what a short and sad story for me.

 

LENOVO, you lost a person who interested your devices for forever. I'm also known as tech enthusiast and expert for my friends and colleagues. Obviously it's impossible for me to recommend Lenovo to anyone..

 

Good luck for you C940 owners. Thanks for your sharing..

 

 

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10 Posts

10-07-2020

Pakistan

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  • Message 14 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-23, 19:50 PM

new bios update didnt solve my problem either.

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2 Posts

10-26-2020

Israel

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  • Message 15 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-26, 17:00 PM

Having the exact same problem.
don't know what else there is to do
very frustrating 

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9 Posts

10-27-2020

United States of America

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  • Message 16 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-27, 4:45 AM

Does anyone now have a solution for this? 

I installed the Windows 2020 October update, Lenovo Bios 10/22 update, and Intel graphics update in October. No idea what else I can try... Is there a way to directly complain to either Microsoft or Lenovo? Recently this issue happens to me very often, like 3-5 times per day. Really annoying.

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11 Posts

10-20-2020

Greece

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  • Message 17 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-27, 9:20 AM

Well, their approach, if you have a warranty, is to change everything from the motherboard to screen. And when you send it in 4 times with the same problem allegedly you can get a replacement. Each time of repair could be 30 days according to them. I am now in my second repair and I hope to get it back soon in order to send it back in for the 3rd time since it is obviously a software issue and they are replacing hardware.  At least, I hope the replacement will be another model and not the same. Because I can't anymore. It's been months...

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3831 Posts

12-13-2016

United States of America

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  • Message 18 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-27, 13:16 PM

@ winrose wrote:
 

 

...it is obviously a software issue and they are replacing hardware.  

 

To anyone with the flickering issue: As I said upthread, boot into the BIOS screens using the Novo button (if equipped). If it doesn't glitch there, it's software. 

 

Doc


____________________________________
I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo. I love beer.

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Check out our new Recent Service Tips Area ..your issue may already be solved!
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158 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

139 Signins

965 Page Views

  • Posts: 158
  • Registered: ‎04-26-2020
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  • Message 19 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-27, 20:52 PM

With respect I think everyone is aware it's a software issue. Why aren't Lenovo monitoring this forum and providing a fix?

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5 Posts

04-08-2016

India

5 Signins

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  • Message 20 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-10-29, 8:28 AM

I just want to confirm that this is Windows v2004 related issue. 

I wanted to run Docker in WSL2 which was possible only in v2004. 

So I force updated by Windows manually to v2004.

I believe Microsoft itself does not recommend this update (as its know to be unstable) and hence does not push this as automatic update.
Thus, I had to manually update this. Before updating, I checked if C940 14IIL is tested for this update or not at this link. And it lists as being tested.

So I went ahead to update manually. After update, everything is working fine except office apps. However, when I switch to Office apps like word and onenote, half bottom of the screen flickers sometimes.

 

I am running Microsoft Office Profession Plus 2016.

About Word says:
Version 2009 (Build 13231.20390)

 

My Windows version is 2004, OS build 19041.572.

Windows Feature Experience Pack 120.2212.31.0

 

Can someone confirm this is the case with other office builds / versions with Lenovo Yoga C940 14IIL?

 

Also note that this link says office 2016 has screen flickering issues.

 

Will this thing ever be fixed?

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