Troubleshoot external monitor connections in Windows 10
Before continuing with troubleshooting, ensure that your device is up to date.
Start > Settings > Update & Security > Windows Update, and then check for updates.
See How to utilise Multiple Monitors in Windows 10 for assistance in configuring your external displays. Resolve issues that come up when installing external displays. If you’re having trouble connecting an external monitor, click the Windows logo key + P to make sure the Extend option is chosen. If the Extend option is chosen, try the troubleshooting steps below.
Using only one external monitor
- Disconnect all accessories from your PC. Connected docks, dongles, adapters and other hardware can cause conflicts.
- Make sure the cable connecting your PC to your external monitor is secure.
- Try changing the cable connecting the external monitor. If the new one works, you know the previous cable was faulty.
- Try using the external monitor with a different system. This can help to isolate whether the issue is with the monitor or the primary system
- If your system has more than one video output port, try plugging your external monitor into one of the other video output ports. Typical ports are HDMI, VGA, DVI, and DisplayPort.
- If your system has more than one display adapter, also called a graphics card, you can try switching your system’s default display adapter. For example, on some systems, you can right click your desktop and select the software associated with your additional display adapter. Steps to change the default display adapter vary by device, so contact the manufacturer for more information.
Adding a second or third external monitor
Note: If you are trying to use a display splitter extend your display to more than one external monitor, you won’t be able to. The splitter is duplicating the same signal instead of creating two independent signals.
- Docking station – To find out if there are docking stations available for your PC, contact the manufacturer of your PC.
- USB adapter – If you have a USB-C port, you may be able to use a USB adapter to give your device an additional video output port.
Troubleshoot issues that are occurring with an existing setup
If your setup has been working well, then suddenly stopped, here are a few things you can try.
- Try a Windows key sequence
- Restart your device
- Roll back your display driver
- Reinstall your display driver
- How do I determine the manufacturer of my display adapter (graphics card)?
- Still having issues?
If you’ve attempted the methods in this article and still can’t find a solution, submit a bug with Windows Feedback Hub.
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