Using a second monitor on a Windows 10 computer can significantly improve productivity. However, when you encounter a problem where the second monitor is not detected or has no signal, do you know how to solve it? This article will provide you with some practical solutions.

If you are engaged in video editing, need to run multiple applications at the same time, or play games on Windows 10, connecting to a second monitor will greatly improve the operating experience. But sometimes after connecting, it is found that the monitor has no signal or the system cannot recognize it. How should I deal with this? Next, MiniTool software will introduce you to several effective solutions.

Common reasons why the second monitor is not detected/no signal

First, let’s analyze the possible reasons why the second monitor is unrecognized:

• Graphics card driver is damaged or errored
• Graphics driver version is too old
• There is a hardware connection problem
• Other unknown factors

In response to these problems, we have sorted out the following specific solutions to help you check and solve problems one by one.

How to solve the problem of not detecting or no signal on the second monitor?

1. Solve problems through hardware troubleshooting
2. Repair through system settings
3. Update or reinstall the graphics card driver

Method 1: Conduct hardware troubleshooting

If the system fails to recognize the second display, the problem is most likely on the hardware connection. It is recommended that you check one by one according to the following steps:

• Make sure the monitor is properly connected to the computer and power connectors
• Power on the monitor
• Restart the computer to resolve temporary connection failures and re-establish connection
• Use the menu buttons that come with the monitor to confirm whether the input source is selected correctly (such as HDMI, DisplayPort, etc.)
• Replace the signal cable to eliminate the possibility of wire damage
• Check the interface type to make sure that matching cables are used (such as HDMI to HDMI, DP to DP)
• Connect the monitor to another computer and determine whether it is a problem with the monitor itself
• Disconnect all external devices (such as mobile hard disks, USB drives, printers, etc.) to avoid interference with the display output

Method 2: Repair through system settings

You can also try to resolve issues that your monitor is not recognized through Windows settings. Here are two possible operations:

Manually detect the second monitor

1. Click the Start Menu
2. Go to Settings > Show
3. Click the Detection button in the Rearrange Monitor area

Try to connect to the second monitor wirelessly

If you are currently using a wired connection, you can try switching to a wireless connection to see if it can solve the problem:

1. Click to start
2. Open Settings > Devices > Bluetooth and Other Devices
3. Click to add Bluetooth or other device
4. Select a wireless monitor or wireless dock in the pop-up window
5. Make sure the target display is turned on and in a detectable state
6. Select the corresponding monitor from the device list
7. Follow the screen prompts to complete the connection settings

Method 3: Update/reinstall/rollback graphics card driver

An abnormal graphics card driver (such as damaged, outdated, or incompatible after update) is also a common reason why the monitor is unrecognized. You can try the following:

Update graphics driver

1. Click to start
2. Go to Settings > Update and Security > Windows Update
3. Click to view optional updates
4. Expand Driver Update and select the graphics driver you want to update
5. Click to download and install , and wait for the update to complete

The issue is usually resolved after updates. However, if the "View optional update" option cannot be found, it means that there are currently no driver updates available. It is recommended to try reinstalling the driver.

Reinstall the graphics card driver

1. Use the Windows search bar to enter Device Manager to open the corresponding program
2. Expand Show Adapter Options
3. Right-click on your graphics card device and select Uninstall device
4. Uncheck to delete the driver software for this device
5. Click Uninstall
6. Restart the computer, the system will automatically reinstall the driver when it is started.
7. Open Device Manager again
8. Right-click on the computer name and select Scan to detect hardware changes

Rollback graphics driver

If the second display problem occurs after updating the driver, you can try rolling back to the previous version:

1. Open Device Manager
2. Expand the display adapter and right-click on the graphics card
3. Select properties
4. Switch to the Driver tab
5. Click to fallback driver (if available)
6. Follow the prompts to complete the operation and restart the computer

Conclusion

Hopefully, the above method can help you successfully solve the problem of the second monitor not detecting or signalless.

In addition, if you accidentally delete important files, you can use the free data recovery tool MiniTool Power Data Recovery to retrieve them. The software provides a trial version, you can first try scanning and previewing files for free, and then decide whether to upgrade to the full version.

If you encounter other problems during the operation, please leave a message in the comment area and we will try our best to answer it for you.

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