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Why does my laptop’s external monitor flicker or have lines on the screen?

< 1 min read

  1. Check the video cable connection (HDMI, DisplayPort, VGA, DVI)
  2. Verify that the external monitor is on
  3. Make sure that the cable is not damaged or loose
  4. Check the external monitor settings
  5. Update your laptop's display drivers to the latest version
  6. Try connecting the external monitor to a different laptop to check if the same issue occurs

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