How to Fix When Second Monitor Is Not Detected
                     How to Fix When 
Second 
Monitor Is Not Detected
If you do not know How to Fix 
When Second Monitor Is Not 
Detected then you can read 
the post to know what to do 
Second Monitor Is Not 
Detected.
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A second monitor provides a simple and convenient way to improve 
productivity or enhance your gaming experience. Not only that, but 
it also gives you a bigger canvas that acts as an additional 
workspace for general multitasking. Connecting your second PC 
monitor is usually a plug-and-play process, but in some cases, 
Windows 10 may not be able to detect the monitor. There are some 
root causes of this problem, such as a damaged or faulty cable, 
your PC does not support the second screen, you have an outdated 
driver, or the display driver cannot handle the second screen. If 
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and resolve problems with your monitor.
You can start with the following basic troubleshooting tips. Before 
you delve into other issues, this may solve your problem of the 
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and the second monitor. If the cable is damaged or faulty, 
Windows will not detect the second monitor. If you change the 
cable and the new cable works with your display setup, it means 
the old one is bad.
• Disconnect any accessories such as connected adapters, dongles, 
or docking stations that could be causing a hardware conflict 
between your PC and the second monitor.
• Try using a second PC monitor with a different system to 
determine whether the problem is with the primary system or 
monitor.
• Check if the second monitor is connected to a power source. Some 
monitors have a switch on the back to turn on the screen.
• Make sure the correct input (HDMI, DVI, etc.) is selected using the 
built-in controls on your monitor.
• To check if the problem is with the graphics card, connect to 
another working monitor.
• You may need to update the firmware of the display being set up 
as a second monitor to resolve compatibility issues or bugs. You 
can do this by visiting the monitor manufacturer’s website and 
checking the support page for how to apply the latest firmware 
update.
Restart Your PC
Restarting your computer works effectively for many issues, 
including when your second monitor is not detected. A restart closes 
all other running processes that may be interfering with the 
connection between your PC and the second monitor.
• To restart your PC, click Start > Power > Restart.
Force Windows 10 to Detect Second PC Monitor
If there is no physical connection issue with your PC and the second 
monitor, you can use the Settings app to locate the second display.
• Open Settings > System.
• Click on Show.
• Go to the Rearrange Your Displays section and click Detect.
Connect Wireless Display
If your physical connection (via cable) doesn’t help Windows 10 
detect the second monitor, try connecting a wireless display instead.
• Open Settings > Devices.
• Click on Bluetooth & other devices.
• Select Add Bluetooth and other devices.
• Click Display or Wireless Dock.
Check that Wireless Display is on and discoverable. Select Display 
from the list, then follow the on-screen instructions to complete the 
setup.
Check Your Display Adapter
If you can connect an external monitor, but the second monitor is not 
detected, your graphics card (also known as a graphics card) may not 
be able to support multiple monitors at the same time. In this case, a 
display splitter won’t help you extend your display to a second 
monitor, as it duplicates the same signal instead of creating two 
independent signals.
If your PC only has one video output port, it means you can only 
support one external monitor. To support multiple monitors, you’ll 
need an additional video output port or a USB adapter for the 
docking station.
Update, Reinstall or Reinstall Graphics Driver
A buggy, outdated or corrupt graphics driver can be one of the main 
reasons Windows 10 will not detect your second PC monitor.
To resolve this issue, you can update, reinstall, or roll back the driver 
to a previous version to fix and restore the connection between your 
computer and the second monitor.
How to Update Graphics Driver
• To update a graphics driver, right-click Start > Device Manager, 
then click on it to expand the graphics card category.
• Right-click on your graphics card (Graphics Card) and select 
Update Driver.
• Click Check automatically for updated driver software, and then 
restart your computer.
If a new driver is found, Windows Update will automatically download 
and install the update. Check if the second monitor is detected after 
updating the driver.
Reinstall Graphics Driver
• Right-click on Start > Device Manager > Graphics Card. Right-click 
your computer’s graphics card, and then click Uninstall device.
• Clear the Remove driver software for this device check box, and 
then click Uninstall.
• Restart your PC and come back to Device Manager. Find and right-
click the name of your PC under Computer. Click Check for 
hardware changes.
At startup, Windows will attempt to reinstall the graphics driver 
automatically, after which you can try to connect to the second 
monitor again.
Reinstall Graphics Driver
A driver update may be preventing Windows 10 from detecting your 
second monitor. If this happens, you can roll back to the previous 
graphics driver to resolve the issue.
• Right-click Start > Device Manager and double-click the 
Graphics card category to expand it. Right-click your 
computer’s graphics card and click Properties.
• Click on the Driver tab.
• Click Reinstall Driver. If the Restore Driver button is not 
available (grayed out), you cannot restore the driver. However, 
you should be able to find an older version of the driver on your 
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your computer.
Conclusion
If you have used any of the above fixes and Windows is now able to 
detect your second monitor, do let us know in the comments section. 
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