05-17-2018 02:07 AM - edited 05-17-2018 02:08 AM
I've got a Lenovo Yoga 520 that I purchased on 6th May 2018, so pretty new!
I've been experiencing a very unusual issue: screen flicker. This includes artifacts, pieces of the UI getting repeated, black lines and full flashes of the entire screen (not just a single app). It seems to happen mainly in Chrome with certain websites, but I've also experienced it with Edge when testing. When you minimise the app that's open when it starts the main issues go away, leaving a slight flickering/wavey effect on the display. Reopening the app causes the issue to start again.
It is difficult to reproduce this issue. I did a little and the results were unusual: today I was working in Chrome and had a display issue appear. I switched tabs until it became less apparent. Then I plugged the laptop into an external display. Then I wobbled the laptop display back and forth a little bit, and realised that doing so made the flicker more intense. However, when switching to a different app, such as Edge or Explorer, or even just minimising Chrome, the issue went away completely. Opening Chrome back up, or simply hovering over it in the Windows task bar to get the preview to fill the screen, immediately caused screen flicker. The flicker was subdued when not moving the screen. At the same time no issues with black screen or artifacts were visible on the external mirrored (HDMI) display.
At first I thought that the screen movement was causing the issue due to a bad connection, however if that were true why does changing which app is open stop the issue despite the wobbling continuing?
Additionally, since things seemed fine with an external display and it only happens when certain apps are open on the screen, it seems unlikely to be a hardware problem, but I could be wrong.
I run a pretty limited software setup (mainly just Chrome), but I have installed Ubuntu alongside Windows 10 which required me to change the disc controller to AHCI. The flickering I've described happened in Windows 10, however I have seen slight screen flickering/water/wavey in Ubuntu under certain conditions.
I've contacted Lenovo support but I would really like to find a fix if possible since I am in the final month of my final year of my degree and therefore am very busy with my dissertation and final assignments. I got this laptop to replace another which died on me!
I'm not sure if a BIOS update might help in this case, but I did investigate it. However, the SHA-256 of the download from the BIOS update page, version 4QCN43WW(V2.07), didn't match the checksum on the page. Given that I've had issues with systems getting bricked by bad BIOS updates, I am wary of doing this without knowing why the Checksum on the website doesn't match the download.
I've also disabled hardware acceleration in Chrome but still got screen flicker.
Any fixes or ideas on what actually is wrong appreciated!
05-17-2018 06:33 AM
Welcome to the Community Forums.
Not being able to replicate it on the external and yet observed in both Windows and Ubuntu may suggest LCD/ LCD connection issue and that opening application may just refresh signal output that corrects the flicker.
Having it wobbled back and forth as you tried also exacerbate the symptoms as may supplement the point of failure. If the display issue also happens within BIOS then we would isolate it with the software and drivers.
I would suggest to have technical support informed of this and keep the case number. Always have a backup of your files and check your calendar for service scheduling if needed.
They can also remotely connect to your machine and try to update drivers and BIOS if necessary but it would be interesting if they would see the flickering in the remote session as compared to your actual view. This would further isolate graphics issue from other software/ hardware that contributes to the artifacts and flickers.
Update us how it goes best for you.
05-17-2018 06:41 AM
Thanks for your thoughts. I've informed tech support and am awaiting a reply.
It is an unusual issue. I understand the link between screen wobble and dodgy connections, but not the fact that switching app while wobbling fixes it. Additionally, in Ubuntu everything seems to be absolutely fine right now. The issue I did see in Ubuntu was very very minor when compared to what happens in Windows (it was simply very slight flicker that I could only see out of the corner of my eye, rather than the full screen flashing black).
There are no issues in Ubuntu when you wobble the screen, even with the same tabs open in Chrome.
I've also ran the Lenovo Vantage diagnostic tools which ran without a hitch.
For now I'm probably going to limp on with Ubuntu and figure out a more fix after my degree. Unfortunately I can't delay my deadlines!
05-17-2018 07:22 AM
One thing that made it an advantage reporting it to tech support is having the issue being documented against the machines record history and that you can formulate an action plan soon as you have a free schedule.
All is needed now is the recommendation of the tech team to proceed that may include video driver update or recreating the issue in the BIOS. Sending the machine for evaluation may also be suggested just to set expectations.
05-23-2018 01:21 AM
Just a little update:
I sent a technical support query on 17th May, incident 180517-000263, however I still haven't recieved any reply. It is now 14 days since reciept so this is the last day I can request a return, therefore I've requested a call-back from tech support. I hope that they can extend my return period so we can actually try to fix this issue.
Overall service so far is abysmal when compared with the ease of Apple's support. Just making technical queries is a pain in the ass.
Thank you for the responses from the community.
06-11-2018 06:33 PM
Facing the same issue here, bought the device from SharafDG UAE, on first boot I got the flickers
After updating the drivers using Lenovo Vantage the problem seems to be gone, hopefully!
I'll reply back if anything new emerges...
07-24-2018 09:18 PM
10-07-2018 01:22 PM
I repackaged the product the same as I got it.
Went to the store, described my issue and demonistrated.
the customer support told me that they need to get the device checked by their technecian to make sure it's deffected and not misused; But I refused and asked for refund.
first, I read on web on several forums that even after repairing the issue came back for many.
second, I was travelling to Jordan for college the next day.
I suggest you doing the same, ask for refund!