Press F5 or Ctrl+R in a browser or app
Right-click the desktop and select Refresh
Use the monitor’s on-screen menu and choose Reset or Auto Adjust
Turn the monitor off and back on
Unplug and reconnect the video cable
Check the input source on the monitor
Restart the computer
Update the graphics driver
Change the display resolution or refresh rate in display settings
Use the monitor’s built-in factory reset option