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Paper Tape
Posts: 1
Registered: ‎01-11-2018
Location: US
Views: 352
Message 1 of 2

Lenovo y40-70 screen goes black/dark

Lenovo y40-70 screen goes black/dark when i unplug the ac power. please help

Sr Support Specialist
Posts: 9,095
Registered: ‎11-30-2015
Location: PH
Views: 325
Message 2 of 2

Re: Lenovo y40-70 screen goes black/dark

Hi Booty,


Welcome to the Community Forums.


Try to open Power options and click on change plan settings.

Change Advance power setting then Display and look for Display Brightness.

Here you can set both On battery and Plugged in options to 100 %.

Hit Apply and ok.


Click off the adaptive brightness if needed.


Update us how it goes.



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