How to set up multiple monitors on Windows 10 | Windows Central.
Really dumb, basic stuff. If so, check out our very own YouTube channel where we cover Windows, Mac, software, and apps, and have a bunch of troubleshooting tips and how-to videos. If the screen is blank on the second monitor also, then it could be an issue with the video cable.
– Fix Blank or Black Monitor Problem on a PC
› library › basics › windowsmulti-display-function.