第二台显示器最广泛用于提供更好的多任务处理体验，与大量应用程序一起工作，从而提高生产力并增强游戏体验。向您的系统添加第二台显示器(Adding a second monitor)通常非常容易，但有时可能会出现一些问题。并不总是计算机和外接显示器之间的连接问题，可能还有更多问题。因此，当系统未自动检测到第二个显示器问题时，可以采取多个步骤来解决和修复第二个显示器问题。
(Fix Second Monitor)修复Windows 10(Windows 10)中未检测到(Detected)第二个监视器
确保 创建一个还原点(create a restore point) 以防万一出现问题。
(Method 1: Fix )方法 1：使用 Windows 设置(issue using Windows Settings)修复 未检测到第二个监视器 的问题(Second Monitor Not Detected )
如果所有连接和电缆都正常并且没有连接问题并且Windows仍然没有检测到外接显示器，那么您可以尝试在Windows 设置(Windows Settings)应用程序的帮助下手动检测显示器。
要通过设置(Settings)应用程序检测显示，请执行以下步骤：
1. 按Windows key + I打开设置。(Settings.)
2. 在设置菜单中选择系统。(System.)
3. 现在选择显示(Display)选项卡。
4. 向下滚动并查找多个显示(Multiple displays)选项，然后单击检测(Detect)。
这些步骤将通过手动检测显示器来帮助您解决问题。
如果无法检测到无线显示监视器，请按照以下步骤操作。(Wireless Display Monitor)
1. 按Windows Key + I打开设置。(Settings.)
2. 单击设备(Devices)选项卡。
3. 在蓝牙(Bluetooth)和其他设备下寻找添加蓝牙或其他(Add Bluetooth or other device)设备并点击它。
4. 在添加设备下，单击无线显示器或坞站。(Wireless display or dock.)
5. 确保您的无线显示器是可发现的。(Wireless Display is discoverable.)
6.从列表中选择所需的外接显示器。(Select the desired external display from the list.)
7. 按照屏幕上提供的说明继续。
(Method 2: Fix )方法 2：通过更新图形驱动程序(issue by Updating Graphics Driver)修复 第二个监视器未检测到 的问题(Second Monitor Not Detected )
有时，由于旧的图形驱动程序当前与Windows不兼容，可能会出现问题。要解决此问题，最好更新图形驱动程序。要更新图形驱动程序，请按照以下步骤操作。
1.右键单击(Right-click)开始菜单(Start Menu)，然后点击设备管理器(Device Manager)选项。
2. 打开设备管理器(device manager)的另一种方法是按Windows key + R ，这将打开“运行”对话框，(Run dialog box )然后键入devmgmt.msc并按 Enter。
3.将弹出一个设备管理器窗口。(device manager)
4. 双击显示适配器，(Display Adapters, )将弹出驱动程序列表。
5.右键单击(Right-click)显示适配器并选择更新驱动程序。(Update Driver.)(Update Driver.)
6. 单击自动搜索更新的驱动程序软件。( Search Automatically for Updated Driver Software.)
7. Windows 将尝试自动更新设备驱动程序。
这是您可以更新驱动程序的方法，这将有助于检测第二台显示器。
另请阅读：(Also Read:) 修复 Windows 10 上的显示器屏幕闪烁问题(Fix Monitor Screen Flickering on Windows 10)
如果您的系统中存在损坏的驱动程序并且驱动程序更新没有帮助，您可以将驱动程序回滚到以前的状态。要回滚驱动程序，请按照以下步骤操作。
1.如上所述打开显示适配器。(Display Adapters)
2. 从驱动程序列表中选择要回滚的驱动程序。
3.通过右键单击( by right-clicking)驱动程序并从上下文菜单中选择属性来打开(Properties)驱动程序的属性。(Driver’s properties)
4. 在更新(Update)驱动下你会得到回滚(Rollback)的选项，点击它，你的驱动就会被回滚。
5. 但是，有时可能会出现回滚选项无法选择并且您无法使用该选项的情况。在这种情况下，请访问您的视频卡的网站并下载旧版本的驱动程序。在更新驱动程序部分，从您的系统中选择这个新下载的驱动程序。这是您可以回滚到旧版本驱动程序的方法。
方法 3：将监视器刷新率设置为相同的值(Method 3: Set the Monitor Refresh Rates to the same Value)
刷新率只是屏幕在一秒钟内刷新其上图像的次数。某些显卡不支持具有不同刷新率的两台显示器。为了解决这种情况，建议两台显示器的刷新率应保持相同。按照以下步骤将两个显示器的刷新率设置为相同。
1. 按Windows key + I打开设置。(Settings.)
2. 在设置菜单中选择系统。(System.)
3. 现在选择显示(Display)选项卡。
4. 向下滚动，您将找到高级显示设置。(Advanced display settings. )点击它。
5. 单击显示器 1 和显示器 2 的显示器适配器属性(Display adapter properties)。
6. 在属性窗口下，单击监视器选项卡( Monitor tab)，您将在其中找到屏幕刷新率。为两个监视器设置相同的值。
这就是您可以为两个显示器设置相同刷新率值的方法。
方法 4：通过更改项目模式修复 Second Monitor Not Detected 问题(Method 4: Fix Second Monitor Not Detected issue by changing the Project mode)
有时，错误的项目模式可能是无法自动检测到第二台显示器的问题。项目模式基本上是您在第二台显示器上想要的视图。要更改项目模式，请按照以下简单步骤操作。
另请阅读：(Also Read:) 如何在 Windows 10 上使用性能监视器（详细指南）(How to Use Performance Monitor on Windows 10 (Detailed GUIDE))
1. 按Windows键(Windows Key)+ P。会弹出一个小列，显示不同类型的项目模式。
2.如果您希望在两个显示器上显示相同的内容，请选择重复。(duplicate)
3.如果您想扩展工作场所，请选择扩展。(extend )
受到推崇的：(Recommended:)
当然，这些方法之一将能够修复 Windows 10 中未检测到的第二个监视器(fix second Monitor not detected in Windows 10)问题。此外，每次出现问题时都应检查物理连接。电缆可能有故障，因此请正确检查电缆。电缆连接的端口选择可能有误。在处理双显示器问题时，应牢记所有这些小事。
Fix Second Monitor Not Detected in Windows 10
A second mоnitоr is most widely used for a better multitasking experience, to work with a large number of applications so as to enhance productivity and also to enhance the gaming experience. Adding a second monitor to your system is usually very easy but sometimes there may be some problems that might arise. It is not always the connection problem between the computer and the external display, there might be a problem more than that. So, there are multiple steps that can be taken to troubleshoot and fix the second monitor problem when the system is not detecting it automatically.
Fix Second Monitor Not Detected in Windows 10
Make sure to create a restore point just in case something goes wrong.
Method 1: Fix Second Monitor Not Detected issue using Windows Settings
If all the connections and cables are fine and there are no connection issues and the external monitor is still not being detected by the Windows, then you can try to manually detect the monitor with the help of the Windows Settings app.
To detect the display via the Settings application, follow these steps:
1. Press Windows key + I to open Settings.
2. In settings menu select System.
3. Now select Display Tab.
4. Scroll down and look for Multiple displays option then click on Detect.
These steps will get you through the problem by detecting the monitor manually.
If there is a Wireless Display Monitor that is not been able to be detected then follow these steps.
1. Press Windows Key + I to open Settings.
2. Click on Devices Tab.
3. Look for Add Bluetooth or other device under Bluetooth & other devices and click on it.
4. Under Add a device, click on Wireless display or dock.
5. Make sure your Wireless Display is discoverable.
6. Select the desired external display from the list.
7. Proceed forward with the instructions provided on the screen.
Method 2: Fix Second Monitor Not Detected issue by Updating Graphics Driver
Sometimes, the problem may arise due to an old graphic driver which is currently not compatible with Windows. To solve this issue it is best to update the graphics drivers. To update the graphics drivers follow these steps.
1. Right-click on the Start Menu then tap on Device Manager Option.
2. Another way to open the device manager is by pressing the Windows key + R which will open the Run dialog box then type devmgmt.msc and press Enter.
3. A device manager window will pop up.
4. Double-click on Display Adapters, list of drivers will pop up.
5. Right-click on the display adapter and select Update Driver.
6. Click on Search Automatically for Updated Driver Software.
7. Windows will try to automatically update the device drivers.
This is how you can update your drivers which will help in the detection of the second monitor.
Also Read: Fix Monitor Screen Flickering on Windows 10
In case a corrupted driver is present in your system and driver update is not helpful you can roll back the driver to the previous state. To roll back the driver follow these steps.
1. Open Display Adapters as stated above.
2. Select the driver from the driver list that you want to roll back.
3. Open the Driver’s properties by right-clicking on it and selecting Properties from the context menu.
4. Below Update driver you will get the option of Rollback, click on it and your driver will be rollbacked.
5. However, sometimes it might be the case that the option of rollback is not available for selecting it and you cannot use that option. In that case, visit the website of your video card and download the older version of the driver. In the update driver section, select this newly downloaded driver from your system. This is how you can roll back to the older version of the driver.
Method 3: Set the Monitor Refresh Rates to the same Value
The refresh rate is simply the number of times a screen refreshes the images on it in a second. Some graphics cards don’t support two monitors with different refresh rates. To tackle this situation it is advised that the refresh rates of both the monitors should be kept the same. Follow these steps to set the refresh rates of both the monitors to be the same.
1. Press Windows key + I to open Settings.
2. In settings menu select System.
3. Now select Display Tab.
4. Scroll down and you will find Advanced display settings. Click on it.
5. Click on Display adapter properties for Display 1 and Display 2.
6. Under the properties window, click on the Monitor tab where you will find the screen refresh rate. Set the same value for both the monitors.
This is how you can set the same refresh rate value for both the monitors.
Method 4: Fix Second Monitor Not Detected issue by changing the Project mode
Sometimes, the wrong project mode can be the issue of the second monitor not being able to be detected automatically. Project mode is basically the view you want on your second monitor. To change the project mode follow these simple steps.
Also Read: How to Use Performance Monitor on Windows 10 (Detailed GUIDE)
1. Press Windows Key + P. A small column will pop out featuring different types of project mode.
2. Select duplicate if you want the same content to be displayed on both of the monitors.
3. Select extend if you want to extend the workplace.
Recommended:
Certainly, one of these methods will be able to fix second Monitor not detected in Windows 10 issue. Also, physical connections should be checked every time there is a problem. The cable might be faulty, so check the cable properly. There might be wrong port selection to which the cable is attached. All these small things should be kept in mind when dealing with a problem of dual monitors.
