If you are trying to use two monitors and LCD. Plus you want to show two different things. It’s very simple, the only item you need is HDMI cable if you have HDMI cable and another monitor you are good to go.
Step 1
Right click on the Desktop and select display settings.
Step 2
Scroll down and go to multiple displays
Step 3
Go to duplicate these displays and choose to extend these displays
Enjoy now just drag and drop one thing on another screen and run 2 different things at same time.