09-13-2017 12:01 AM
I bought the Lenovo Y40 a few years ago and RARELY used it. But when I did it worked fine until I upgraded to Windows 10. Since then the screen flickered when on battery power only. I just recently installed latest Windows 10 updates (9/12/2017) hoping it would resolve. Now the screen goes black entirely when unplugged. I have tried seemingly ALL the suggested posts on Power Management and even replugged in the display. So many people seem to have had this resolved via Power Management - I can't seem to. Help!
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09-15-2017 01:44 AM
Thanks for using the Lenovo forums.
Have a read of the following posting, see if this is able to help you out at all:
Hope this helps, let us know how you get on.
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09-15-2017 07:31 AM
That thread doesn't seem to be relating to the issue I am having. When I unplug my AC power the display's backlight goes off (the same as if you hit Fn+F2). You can still faintly see the screen and the computer works - you just can't see what you are doing. If I take a screen shot of the battery meter when in this state I can tell when I plug the AC back in that the battery meter shows 97%.
This is similar to the threads stating the display "flickers" when the AC is unplugged after upgrading to Windows 10. With the latest update to Windows 10 recently I thought I would try it to see how it affects my display (hoping there was a fix to resolve it). Now it just seems to shut off the backlight as mentioned. From what I can tell there is no "flickering" in that state, but still unusable without the AC plugged in.
08-25-2018 04:41 PM
Yes, I did! I ended up buying a new screen that I installed myself (super easy). The screen was about $60. It was my last ditch effort since none of the software settings were helping. Somebody (somewhere on the internet) mentioned a new screen and it worked.
08-29-2018 04:14 PM
Thank you so much! I just put the new screen replacement and it works perfectly, I tried two batteries and all the power management stuff, also tried with windows 8 and 10. I was getting crazy searching in the web. I really needed it for my classes without depending from the charger.
08-30-2018 07:31 AM
Glad I could help. I know how it feels. I searched on and off for months. It was a computer I rarley used, let the warranty expire, but it was still pretty expensive. I almost scrapped it. If a laptop can't be a laptop, what's the point? Surprised the solution was so hard to find. Lenovo should have known this since it seemed to be linked to the Windows 10 update from a long time ago.