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4 Posts

02-14-2018

United States of America

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-07-05, 21:31 PM

I have been using my new Lenovo for 3 weeks and have experienced the screen shutting down, random patterns and flickering screen since I got it.  This happened before and after the bios update last week.  Is it time to take it in under warranty?

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170 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-07-05, 21:40 PM

Sounds more like a hardware issue.

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4 Posts

06-13-2018

United States of America

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-07-05, 23:47 PM

If you haven't tried the latest graphics driver from Intel's site I would try that first before sending it in. Ours did not have screen problems when we received them and the problem seemed to be possibly caused by an update. Others who sent theirs in had parts replaced by Lenovo and most seemed to still have the issue after they got it back from warranty repair which is another reason I tried all the other things first. If the things I did hadn't fixed the issue I would then have sent it in. I had a couple more of the 940s start to have the issue and doing those things seems to have fixed the problem. We also have a 3 year warranty on them so I knew I had time to try to solve it on my own. If you are running short on warranty then you should probably send it in so you have a record showing it started while under warranty. Good luck.

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1 Posts

07-09-2021

United States of America

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-07-09, 17:53 PM

I had similar issue , and it was with the graphics driver. I got the driver from some forum but not having the details of the forum. I installed driver igfx_win10_100.9025.exe and it got fixed. But the driver every time one way or other getting updated and the issue happens over and over. I have to downgrade when I see the issue. I hope this would fix. Tryin to attach driver but not sure if it allows.

adding driver link https://downloadmirror.intel.com/30027/a08/igfx_win10_100.9025.exe 

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2 Posts

09-25-2021

South Africa

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-09-25, 10:58 AM

Potential solution

 

Hi everyone

 

Reinstalling the graphics driver and chipset driver seemed to do the trick.

 

I have a 12-month-old Yoga c940 that was glitching terribly whenever someone screen shared on a Zoom call and it got worse over time. The bottom half of my screen would go dead and the rest would flicker even if I closed the zoom application. It only resolved if I rebooted my laptop. But I think I've managed to fix it.

 

I chatted to a lenovo technician and did the reinstallments this morning and the problem seems to have stopped. I hope that might also work for you.

 

Best of luck

 

Kind regards

Micaella

0 person found this solution to be helpful.

This helped me too

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3 Posts

01-28-2020

United States of America

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-10-15, 21:46 PM

I've been using my laptop for 15 months now. The issues started around 3 months after I purchased it. It was never too bad, very random, and not so frequent at first, but then it got more frequent, and I found this forum I tried the proposed solution installing the latest drivers from Intel.

It got much better, I even thought it was solved. But now I installed Windows 11 and it got bad again.

 

The new thing I noticed was that the screen goes back to normal if I fold the monitor into tablet mode or 360 degrees, and it starts again if I fold it back to 90 degrees.

 

 

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4 Posts

02-14-2018

United States of America

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-10-15, 23:34 PM

Thanks - I will try that sometimes.  I usually keep hitting the on off button and that usually helps, or I CTRL TAB to another screen.

 

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2 Posts

03-25-2021

United States of America

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-10-17, 23:42 PM
I finally got mine to stop after installing the latest drivers from intel. The problem was really prevalent during zoom meetings. I don't want this to return if I install Windows 11. I wonder if other people have also seen this resurface after installing Windows 11.
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170 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

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  • Message 309 of 315

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-10-18, 20:06 PM
I've got the C940 working as I want (finally) so I've blocked Windows updates, driver updates and not installing any new BIOS. Putting in Windows 11 is just asking for trouble with such an unstable laptop.
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3 Posts

01-28-2020

United States of America

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-10-18, 20:20 PM

I found new drivers in Intel's website; I'm testing them with Windows 11.

For now it's been more stable.

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