Installed Windows 10, now only external monitor works, not laptop monitor. Go to Graphic Setting but it only see the external

[dwn]

I just installed Windows 10. Now my laptop monitor won't work - only the external monitor. I go to Graphic setting and click on multiple displays, but it states it doesn't see another device only the external monitor. Tried disconnecting the external monitor and rebooting, but the laptop display still doesn't turn on.

 

[Slashgeek]

Try updating your graphics drivers to the latest Windows 10-compatible versions. If you upgraded from Windows 7 or 8, you may be experiencing incompatibility issues with drivers carried over from your previous OS.