Welcome to our peer-to-peer forums, where owners help owners. Need help now? Visit eSupport here.

English Community

Lenovo NotebooksLenovo Yoga Series Notebooks
All Forum Topics
Options

3 Posts

09-19-2020

United States of America

17 Signins

75 Page Views

  • Posts: 3
  • Registered: ‎09-19-2020
  • Location: United States of America
  • Views: 75
  • Message 131 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-20, 18:48 PM

OK....I got screen flickering same as others reported, mainly the taskbar issue as shown in the link from post above (https://www.reddit.com/r/Lenovo/comments/irj6zo/is_anyone_else_having_this_issue_on_their/)

For me, it seemed to only happen in Chrome. and it's random, sometimes no issue, and sometimes when opening a new tab, and sometimes when chrome is open but I'm not doing anything in it. very frustrating, since unable to recreate with a specific action.

 

The recommendation to install the newer Intel drivers seemed to fix it for a few days....but issue came back. its been a few weeks now, since that I updated the intel drivers.

So, the new Intel drivers appear to have reduced the frequency of the screen flickering occurrences. (which, as an I.T. myself, find very irritating, as this should be an all or nothing type of thing). 

 

I was ready to return laptop, but seeing that it may be software/driver issue, I'm waiting bit longer (I bought laptop at BestBuy in Oct 2020, and have until Mid Jan 2021 to return it).

 

However, yesterday, while watching youtube in Chrome browser, screen flickering happened again, but this wasn't the taskbar being repeated from top to bottom...it was different. The middle of the screen where the video was, began flickering, and even after closing chrome that same place in the middle of the screen still flickered, with the last frame of the youtube video, like it was burnt into the screen and flickering (like the old days, with CRT screen with no screensaver), closing lid and reopening didn't make it stop. it remained even after a restart.....which is completely something else from the the flickering everyone reporting. after shutting down and waiting a bit, powering back on, did it go away. been using laptop all morning, with video calls, and youtube, etc... no issues.  really weird how random it appears to be.

 

 

Now here's specs...

Laptop

Lenovo Yoga C940-14IIL Laptop (ideapad) - Type 81Q9 (UHD 4k Display)

CPU: 10th Generation Intel® Core™ i7-1065G7 Processor 1.30 GHz

MEM: 16 GB LPDDR4X 3733MHz

Display: 14.0" UHD (3840 x 2160) IPS, touchscreen, glossy, HDR 400, 500nits

 

Windows

Edition: Windows 10 Home

Version: 2004

Installed On: 11/5/2020

OS Build: 19041.685

Experience: Win Feature Pack 120.2212.551.0

 

Device Drivers

Display Adapter: Intel Iris Plus Graphics Driver

Version: Intel 27.20.100.8935 (10/28/2020)

 

Chrome Version 87.0.4280.88 (Official Build) (64-bit)

 

I hope this helps, and I'm open to discuss further with anyone. Hope we can figure this out soon.

Thank you.

Reply
Options

2 Posts

12-19-2020

Canada

2 Signins

15 Page Views

  • Posts: 2
  • Registered: ‎12-19-2020
  • Location: Canada
  • Views: 15
  • Message 132 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-21, 22:04 PM

After a few days of the computer running with 9030, the issue is still there, but not as frequent as when it started. 
the flickering shows up after an hour to two hours of constant use. 

I'll be sending it in and fingers crossed it can be fixed 

Reply
Options

170 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

150 Signins

1035 Page Views

  • Posts: 170
  • Registered: ‎04-26-2020
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 1035
  • Message 133 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-22, 6:45 AM

Pretty pointless sending it in unless you want to go down the refund route.

 

It's quite obvious that it's a software rather than hardware fault, and Lenovo are clueless to what the problem is. 

 

Replacing motherboards and displays won't make a blind bit of difference.

Reply
Options

11 Posts

10-20-2020

Greece

15 Signins

155 Page Views

  • Posts: 11
  • Registered: ‎10-20-2020
  • Location: Greece
  • Views: 155
  • Message 134 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-22, 12:52 PM

My laptop is still fixed after 1.5 month. So, it's a hardware issue as I told you before. I haven't seen the issue again ever since and before that it occured 3 times per hour. I f you have a warranty send it in. It's not an easy road but it will get fixed eventually.

Reply
Options

62 Posts

11-14-2020

Turkey

63 Signins

620 Page Views

  • Posts: 62
  • Registered: ‎11-14-2020
  • Location: Turkey
  • Views: 620
  • Message 135 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-22, 19:25 PM

Welcome back Winrose

 

It would be really great to hear what your service exactly did to your device to fix for people who thinks to go warranty route to handle this issue. If you have an explanation report of service or smth... So we can tell this feedback to our services as a solved case.

Regards.

Reply
Options

6 Posts

12-15-2020

United Kingdom of Great Britain and Northern Ireland

6 Signins

25 Page Views

  • Posts: 6
  • Registered: ‎12-15-2020
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 25
  • Message 136 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-23, 23:16 PM

Sadly, I have reached the conclusion that whilst we are an active minority who have called Lenovo out for a frankly inexcusable failing in their product, they simply don't care - in the scheme of things we are collateral damage that is annoying but not worth investing in to avoid, so we'll be hung out to dry. Thousands will have the same issues but not complain, companies will continue to buy the Yoga C940 and the next product release may address the problem. Lenovo don't care about what is written on this forum, nor will they respond to it (though they may ensure the next generation of products don't have the same failings) - they will only stand up and take notice when it hurts them commercially and we're way off that mark so either we solve this ourselves or accept that we've been shafted and move on. As someone who has bought Lenovo for last 10+ years I get the frustration that they simply don't care but if we want them to sit up and take notice then this forum is not the place. I am really disappointed in the performance of the Yoga 940 so maybe now is the time to share the link to this forum with the wider world - it may just hurt Lenovo more than trying to engage with them directly.

Reply
Options

38 Posts

02-02-2014

Canada

56 Signins

413 Page Views

  • Posts: 38
  • Registered: ‎02-02-2014
  • Location: Canada
  • Views: 413
  • Message 137 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-24, 10:42 AM

Just curious to everyone in this thread, have any of you experienced any sleeping overheating issues while charging? To the point where it shuts off due to the laptop reaching thermal limits? This specifically only happens in sleep mode WHILE charging.

Reply
Options

170 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

150 Signins

1035 Page Views

  • Posts: 170
  • Registered: ‎04-26-2020
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 1035
  • Message 138 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-24, 15:15 PM

I don't use sleep mode, it's a disaster on the C940. Common problem though. Another bug with this fantastic machine /sarcasm

 

 

Reply
Options

12 Posts

12-25-2020

Netherlands

8 Signins

70 Page Views

  • Posts: 12
  • Registered: ‎12-25-2020
  • Location: Netherlands
  • Views: 70
  • Message 139 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-25, 11:16 AM

Hi all, 

 

I received my Lenovo yoga C940 15irh 3 days ago, and mine has the exact same problem.

Screen glitches and flickering on battery power. When it's plugged in, it doesn't seem te appear.

I've tried all solutions listed, the Lenovo solution with the drivers, I've tried the windows 1909 build and turning off hardware acceleration. None of it seems to help.

 

I really want to love this one, because it has all the specs I need. 

Does anyone have another tip that might help?

 

Kind regards! 

Reply
Options

12 Posts

12-25-2020

Netherlands

8 Signins

70 Page Views

  • Posts: 12
  • Registered: ‎12-25-2020
  • Location: Netherlands
  • Views: 70
  • Message 140 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-25, 11:54 AM
I've decided to send mine in aswell. Does yours also still work with latest windows update and Hwa turned on? And do you know what they replaced?
Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete

X

No, I don’t want to share ideas Yes, I agree to these terms