There might be a connection problem with your PC or with your monitor or screen. Here are some things to try.
If you’re using a desktop PC:
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Make sure your monitor is plugged in and turned on.
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Unplug the video cable from both your monitor and PC, then reconnect them firmly. After you reconnect the video cable, move your mouse to see if the cursor moves on your screen.
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Try using a keyboard shortcut to increase the brightness level of your monitor (look in the top keyboard row for a function key with a light symbol). This option may not be available for all PCs.
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If you have a TV connected to your PC, make sure it's turned on and set to the input for your PC.
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Try connecting to different video outputs on your PC. Sometimes driver changes can cause the video to be sent to a different display adapter or output.
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If you have your own display adapter installed and connected to your monitor, try connecting your monitor to the built-in video on the motherboard.
If you’re using a laptop or tablet:
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Temporarily remove it from the docking station if it's docked. Make sure the lid of your laptop is completely open after undocking.
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Make sure the external monitor is turned on and plugged in.
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Try using a keyboard shortcut to increase the brightness level of your monitor (look in the top keyboard row for a function key with a light symbol). This option may not be available for all PCs.
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Check for damaged cables (DVI, VGA, HDMI, Thunderbolt, DisplayPort), loose connections, or faulty adapters (such as DVI-to-VGA).
If you’re using multiple monitors:
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Try projecting video to a different monitor. Select Windows logo key + P, select a display option, then press Enter.
