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3 Posts

03-11-2021

Canada

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-03-12, 16:59 PM

Hello I am also having this problem, the screen frequently glitches and lines appear across the bottom portion of the screen, or areas of the screen go black. When the lines glitch it seems to mostly happen with Microsoft Office applications but it is not limited to them. 

 

Closing the lid and reopening seems to deal with it temporarily. My laptop does also seem to get very hot at times, especially the middle/top of the keyboard area.

 

I have tried removing and reinstalling my display driver, and also uninstalling and reinstalling Microsoft Office.  I am not savvy enough to follow what my next steps should be. Can anyone please let me know what specific display drivers I should install? 

 

I have:

Lenovo C940-14IIL
i7-1065G7 CPU @ 1.30GHz
1.50 GHz

 

Windows 10 Home

Version: 20H2

OS Build: 19042.867

Display: Intel(R) Iris(R) Plus Graphics

Driver: 27.20.100.8280

Date: 2020-05-19

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158 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-03-12, 17:06 PM

I guess you didn't bother reading even a couple of pages above this one then?

 

https://downloadcenter.intel.com/download/29230

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3 Posts

03-11-2021

Canada

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-03-12, 17:31 PM
Thanks, just wanted to make sure that was the right driver for my laptop, since I thought people had been talking about other versions as well. I kept getting an error when I tried installing the new driver. I just figured out I needed to disconnect the internet. Thanks for the kind response
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2 Posts

10-18-2020

Iceland

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-03-13, 21:54 PM

same issue here

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15 Posts

03-11-2021

Canada

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-03-13, 23:08 PM

So i just happened to be scrolling through this topic and seen a comment about the refresh rate. Im having screen flickering along the very top of mine and when i went to set this to 48hz, its gone now. As soon as i go back to 60hz, the issue comes back!

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1 Posts

03-15-2021

Germany

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-03-15, 11:57 AM

Hello,


I have exactly the same issues with my Lenovo C940-14IIL. 
Unfortunately, installing new Intel drivers did not change anything.


But I noticed that after turning on flight mode, the flickering was gone. 

After turning off  flight mode, the flickering is back. 

In case I´m still in  flight mode but enable WiFi the flickering is also back.

Can anyone confirm this behavior?

 

Thanks and greetings

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3 Posts

03-16-2021

Croatia

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Ideapad Yoga C940-Screen flickering every five 5-10min

2021-03-16, 17:23 PM

My laptop is under warrenty. 5 months ago it was repaired and the LCD panel was changed. But as soon as I started to use it again the screen started to fllicker. Each time I recorded it. I returned it to my local Lenovo store and servis to repair it. The answer they came up with is that nothing is wrong. I have sent them numerous videos like this and explanation of the problem but they are not hearing it. It is very frustrating. It is a new laptop that costs a lot of money and it has already been 2 times for repair. And yes, everything is up to date. Please help, I do not know what to do anymore.

 

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3582 Posts

11-04-2019

United States of America

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Re:Ideapad Yoga C940-Screen flickering every five 5-10min

2021-03-16, 17:28 PM

@ Boci5 wrote:

My laptop is under warrenty. 5 months ago it was repaired and the LCD panel was changed. But as soon as I started to use it again the screen started to fllicker. Each time I recorded it. I returned it to my local Lenovo store and servis to repair it. The answer they came up with is that nothing is wrong. I have sent them numerous videos like this and explanation of the problem but they are not hearing it. It is very frustrating. It is a new laptop that costs a lot of money and it has already been 2 times for repair. And yes, everything is up to date. Please help, I do not know what to do anymore.

 

Welcome to the Community Forums @Boci5!

 

Nice to have you here!

 

Does the Yoga C940's screen also flickers when the lid/display panel is moved?

Check if the screen will also flicker when it's in Safe mode or even when inside BIOS menu.

Also, try connecting it to an external monitor to test.

 

We'll be waiting for your response.


Thanks,

Adriel_Lenovo

Lenovo Support

 



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158 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

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Re:Ideapad Yoga C940-Screen flickering every five 5-10min

2021-03-16, 18:07 PM

See this is typical of how bad Lenovo are. How can the mods on here have missed a massive 26 page thread that has been on the forum for MONTHS about this very issue and how to fix it.

 

Even worse is the fact the laptop has been "repaired" twice with absolutely no need as it's purely a software issue.

 

The mind boggles, it really does. I despair.

 

It's interesting how the support people on here post an initial response then nothing. It's almost as though it's just a bot and not even a real person.

 

https://forums.lenovo.com/t5/Lenovo-Yoga-Series-Notebooks/Lenovo-Yoga-C940-screen-glitches-flickering-flashing/m-p/5044566?page=26#5282098

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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
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 965
  • Message 260 of 304

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-03-16, 18:26 PM

Look at the response from support on the link below.

 

How the hell could they have missed this thread?

 

https://forums.lenovo.com/t5/Lenovo-Yoga-Series-Notebooks/Ideapad-Yoga-C940-Screen-flickering-every-five-5-10min/m-p/5071043

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