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

Monitor is powered on, but it does not turn on after boot-up beep. If the video card should be blamed, then why the monitor turns on after 5-6 boot-up attempts?

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.