On macOS, go to “System Settings” > “Displays” and hold Option to reveal the “Detect Displays” button. Make sure the correct ...

So, if your PC turns on when you power it on, but you don't see anything on your monitor, the first thing to do is check the connection via HDMI or DisplayPort.

If your PC isn't displaying on your monitor, don’t panic. Here are the common causes and quick fixes to get your screen working again.