When I unplug the power supply, the screen goes blank, as if I pressed fn+f2

[Michael_73_]

I have a lenovo y40-80. It works fine when plugged in but when I unplug the power supply the laptop screen goes black, I can still use the monitor. I noticed that the same thing happens when I press fn+f2. So the screen isn't turning off but the back lighting is turning off (I think that's what I mean). To clarify, if I point a flashlight at the screen after pressing fn+f2 or unplugging the power supply I can dimly see the image, but it is red and white, maybe black as well. I have been looking around for a solution and think it may be the "Rixane Power Scheme" but I can't figure out how to change that on Windows 10.
Thanks in advance for any help!

 

[velo3100]

I know this is for a hp laptop but see if this helps: http/h30434.www3.hp.com/t5/Notebook-Software-and-How-To-Questions/HP-Support-Assistant-s-Contact-Technical-Support-Crashing/td-p/2358087/page/3

 

[Michael_73_]

Yeah I tried that but I can't find the setting. I think it is because I am in windows 10 and they changed the name for it. I'll keeping looking for it though.