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02-25-2020

ME

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Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-06-28, 7:49 AM

Hallo everybody!

 

Recently, I have a problem with brightness of the screen. My Yoga S740-14 IIL configuration is: i7-1065G7, 16 GB RAM, 1TB SSD and UHD screen panel (500 nits). After installing Windows 10 Home Version 2004 the screen was working fine. Then after few days screen have become dim with brightness cca. 250 nits. 

 

I have installed latest laptop BIOS BYCN35WW and the problem remains. Same holds for reinstalling Intel® Graphics - Windows® 10 DCH Drivers latest version 27.20.100.8336.

 

The only way, I can temporarily restore original screen brightness, is by disabling "Intel(R) Iris(R) Plus Graphics" display adapter in "Device Manager" and then enabling it again. The brightness is normal until next computer reboot. After rebooting the brightness is again dim.

 

Anyone of you have the same experience or knows how to solve the problem?

 

Best regards,
Stevan

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10 Posts

06-28-2020

CH

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Re:Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-06-28, 15:23 PM

Dear Lenovo Support,

Please notice I have the exact same issue here with the exact same model.
Bought recently in early June 2020 at a fair price (I understand now why... Seems like this config suffers from incompatibility with W10 latest build version...).

Also note my current build version is w10 1909 (Pro) since I was unable to install the latest 2004 build (update error - whether it is launched by the system itself or manually downloading the source ends the same way...).

Please advise, a lot of time wasted here - thinking I should have bought a professional series to do... professional stuff, really disappointing piece of equipment.


P.S. To me it actually looks like brightness moves from hi to low depending on the program that's in use - it is not documented at all on the Web (neither on Lenovo's site or anywhere by Microsoft as well...) It is a very poor and frustrating visual experience then (also note I could not find any option fixing this in Intel's "Graphic Command Center"...).



BR.

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9 Posts

02-25-2020

ME

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Re:Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-06-29, 14:18 PM
Phosym, Thanks for replay! I suspect that this is the issue with Intel(R) Iris(R) Plus Graphics driver. I have also reported Intel about this bug. My computer doesn't reduce screen brightness depending on the program I use. It is program invariant, just dim all the time. Best regards, Stevan
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10 Posts

06-28-2020

CH

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Re:Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-07-01, 12:47 PM

Well that's really weird behavior, never seen this before on any device - and as a former IT guy I've seen a lot of HW weirdness...At the end it just make this interesting device a "not so efficient" to use as profesionnal laptop... Should have consider a thinkpad instead (also thinkpad use far better, nore performant and reliable SSD...).Without these issue the laptop is pretty decent at its current "end-of-serie" price, SDD and display weirdness and bad color rendering apart (my display, depending on the brightness sat goes from blueish to redish colors, bottom to top...).BR.

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CH

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Re:Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-07-04, 11:13 AM

Dear Lenovo Support,


Still not a single help nor answer / suggestion here. What's the point, shall we wait for months to get assistance ?
Poor quality support seems to follow the reputation here (at least for what I've heard here in Switzerland...).


BR, 

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9 Posts

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ME

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Re:Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-07-07, 7:51 AM

Hi!

 

In the meantime, I have tried on the suggestion of Intel Support Team to install latest Intel Graphic Driver version 27.20.100.8336. Unfortunately, this driver was not able to fix the problem with my dim Lenovo Yoga S740 screen.

 

Best regards,
Stevan

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06-28-2020

CH

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Re:Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-07-11, 17:46 PM
Hi Stevan, Sad it did not help, but to me not that surprising... I hope this display will be properly supported with W10 2004 build (which is still mentioned by MS as not ready "for your hardware", despite what Lenovo claims here : https://support.lenovo.com/us/en/solutions/ht510448 Wait and See....
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6 Posts

07-13-2020

US

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Re:Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-07-13, 10:53 AM

Hi,

 

I'm experiencing the same here. I have the latest Intel Iris drivers from the Lenovo website, haven't tried the ones from the Intel website yet. 

 

 The only way, I can temporarily restore original screen brightness, is by disabling "Intel(R) Iris(R) Plus Graphics" display adapter in "Device Manager" and then enabling it again. The brightness is normal until next computer reboot. After rebooting the brightness is again dim.

 

Your temporary fix works for me too, and the screen is light again, but it cannot be adjusted w/ the brightness settings. After resetting, dim again.

 

Has anyone found another solution?

 

Thanks!

 

Cheers,

 

Ondrej

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12 Posts

06-20-2020

CA

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  • Message 9 of 37

Re:Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-07-14, 0:48 AM

I have a similar but different issue, with C940-14IIL, also with the ice-lake i7-1065G7 CPU and 4K display LCD. I chose this particular CPU because of better graphics but boy am I having all sorts of grief with it.

 

First I have numerous weird issues with external Dell displays. So I did a fresh clean install of Win10 from scratch and installed all the latest drivers from Lenovo website for the C940-14IIL, just yesterday. I'm on version 2004 right now.

 

Now I can't seem to adjust the brightness of my laptop display. It is too bright. The brightness control is at about 75%. Pressing the brightness buttons shows the blue brightness vertical bar but it moves only 1 notch and I don't see a difference - it's way too bright in my dim room.

 

I'm also still having issues with my Dell external displays.

 

Dunno, this Yoga with ice-lake is just lots of display problems. How do I get my money back? I don't have time to be a beta tester.

 

Why do the companies make soooo many different models. Just keep it simple ... focus on making stuff work well instead of all this variety that mankind doesn't need.

 

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6 Posts

07-13-2020

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Re:Lenovo Yoga S740-14IIL Screen Brightness Problem

2020-07-15, 10:36 AM

Zed, you seem to have a complete opposite. 

 

It looks like you're in the state which we get after disabling/re-enabling the Iris Graphics in the Device Manager. I would suggest installing the latest Intel Iris Drivers from the Intel website. But you may end up with a dim display as we do :)

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