cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
hedgerocket
What's DOS?
Posts: 4
Registered: ‎09-12-2017
Location: US
Views: 1,427
Message 1 of 7

Y40 black screen when unplugged from power (tried all power management suggestions)

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!

Support Specialist
Posts: 2,948
Registered: ‎02-22-2017
Location: GB
Views: 1,392
Message 2 of 7

Re: Y40 black screen when unplugged from power (tried all power management suggestions)

Hello Hedgerocket

Thanks for using the Lenovo forums.


Have a read of the following posting, see if this is able to help you out at all:

 

https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Y40-70-turns-off-when-unplugged/m-p/2068450

 

Hope this helps, let us know how you get on.


==================================================================================
Did someone help you today? Thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"!

 

This will help the rest of the Community with similar issues identify the verified solution and benefit from it.



Pesszimistának lenni a legjobb, vagy igazad van, vagy kellemesen meglepődsz...
hedgerocket
What's DOS?
Posts: 4
Registered: ‎09-12-2017
Location: US
Views: 1,387
Message 3 of 7

Re: Y40 black screen when unplugged from power (tried all power management suggestions)

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.

Jonmol37
What's DOS?
Posts: 2
Registered: ‎08-25-2018
Location: US
Views: 1,065
Message 4 of 7

Re: Y40 black screen when unplugged from power (tried all power management suggestions)

did you solve the problem? I hace exactly the same problem

hedgerocket
What's DOS?
Posts: 4
Registered: ‎09-12-2017
Location: US
Views: 1,070
Message 5 of 7

Re: Y40 black screen when unplugged from power (tried all power management suggestions)

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.  

Jonmol37
What's DOS?
Posts: 2
Registered: ‎08-25-2018
Location: US
Views: 1,011
Message 6 of 7

Re: Y40 black screen when unplugged from power (tried all power management suggestions)

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.

hedgerocket
What's DOS?
Posts: 4
Registered: ‎09-12-2017
Location: US
Views: 998
Message 7 of 7

Re: Y40 black screen when unplugged from power (tried all power management suggestions)

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.

Check out current deals!


Shop current deals

Top Kudoed Authors