如果屏幕镜像(screen mirroring)不适用于您的 Windows 10 PC，其背后可能有多种原因。可能设置不正确，或者没有选择电视上正确的输入模式，等等。
幸运的是，您可以通过在 PC 上到处调整一些选项来解决大部分问题。我们会告诉你怎么做。
Use the Correct Input Mode on Your Screen/TV
大多数显示器和电视都有多种输入模式供您选择。首先(First)，您需要选择您的 Windows 10 PC 连接到的模式。
例如，如果您的 PC 连接到电视上的HDMI端口号 2，则应在电视的设置中选择该输入模式号。这会告诉您的电视从哪个来源获取内容并将其显示在屏幕上。
大多数电视遥控器都有输入模式(Input Mode)或来源(Source)按钮。按下那个按钮，选择正确的模式，你就可以开始了。
重新启动 Windows 10 PC 以解决屏幕镜像问题(Restart Your Windows 10 PC to Get Around Screen Mirroring Problems)
有时，Windows 10 PC 上的小故障会导致屏幕镜像无法正常工作。在这些情况下，简单的重启通常可以解决问题。
要重新启动 Windows PC(reboot your Windows PC)，请打开“开始(Start)”菜单，选择电源图标，然后选择“重新启动(Restart)”选项。
当您的 PC 重新启动时，将您的 PC 重新连接到您的显示器，屏幕镜像应该可以正常工作。
使用硬件和设备疑难解答来修复屏幕镜像不起作用(Use Hardware and Devices Troubleshooter to Fix Screen Mirroring Not Working)
处理 Windows 10 PC 上大多数类型问题的一种简单方法是使用内置疑难解答。Windows 10 有许多疑难解答程序，其中之一是硬件(Hardware)和设备(Devices)疑难解答程序。您可以使用它来查找和修复设备问题(fix issues with your devices)，最终修复屏幕镜像问题。
要使用该疑难解答：
- 同时按Windows + R键打开运行框。(Run)
- 在“运行”(Run)框中键入以下命令，然后按Enter：
msdt.exe -id DeviceDiagnostic
- 在硬件和设备(Hardware and Devices)疑难解答屏幕上选择下一步。(Next)
- 等待(Wait)疑难解答程序找出您的设备存在的问题。然后，疑难解答程序将提出解决这些问题。
问题解决后，启动屏幕镜像(start screen mirroring)，它应该可以正常工作。
检查您的 Windows 10 PC 是否支持 Miracast(Check If Your Windows 10 PC Supports Miracast)
如果您尝试将Windows 10 PC 的屏幕镜像到无线显示器，请确保您的 PC 支持Miracast。您的 PC 必须具有此功能才能将屏幕投射到外部无线显示器。
有一种简单的方法可以检查您的 PC 是否支持该功能：
- 同时按Windows + I键打开设置应用程序。(Settings)
- 在设置(Settings)窗口中选择系统。(System)
- 从左侧边栏中选择显示。(Display)
- 向下滚动右窗格至多显示器(Multiple displays)部分。如果您在此处看到“连接到无线显示器(Connect to a wireless display)”选项，则表示您的 PC 支持Miracast。
- 如果您没有看到该选项，则您的 PC 不支持Miracast。
如果您的 PC 不支持Miracast，您不必失望。您仍然可以将 PC 的屏幕镜像到显示器(mirror your PC’s screen to your monitor)，但使用物理电缆连接。
为此，请检查显示器的背面并查看它支持的电缆类型。在大多数情况下，您会在显示器上找到一个HDMI端口。如果是这种情况，请获取HDMI电缆并使用该电缆将您的 PC 连接到显示器。
然后，您会立即在连接的显示器上看到您的 PC 屏幕。
启用 Wi-Fi 以修复屏幕镜像问题(Enable Wi-Fi to Fix Screen Mirroring Issues)
要将 PC 的屏幕无线镜像到显示器，您必须在 PC 上启用Wi-Fi 。这是一个必要的先决条件，但许多人忘记了它。这将导致屏幕镜像不起作用。
要在您的 PC 上启用 Wi-Fi：
- 通过同时按Windows + I键打开设置应用程序。(Settings)
- 在设置(Settings)窗口中选择网络和 Internet 。(Network & Internet)
- 从左侧边栏中选择Wi-Fi 。
- 切换右侧窗格中的Wi-Fi选项。(Wi-Fi)
您需要将 PC 连接到与外部无线显示器相同的Wi-Fi网络才能启用屏幕镜像。
更新显卡驱动程序(Update the Graphics Card Drivers)
过时或有故障的显卡驱动程序会导致各种问题，包括导致屏幕镜像无法在您的 PC 上运行。如果您遇到这种情况，请将显卡驱动程序更新(update the graphics card drivers)到最新版本，这应该可以解决您的问题。
好消息是您可以在 Windows 10 PC 上自动更新驱动程序：
- 通过访问开始(Start)菜单、搜索设备管理器(Device Manager)并在搜索结果中选择该工具来打开设备管理器。(Device Manager)
- 在设备管理器(Device Manager)窗口的显示适配器(Display adapters)部分找到您的显卡。
- 右键单击您的显卡，然后从菜单中选择更新驱动程序。(Update driver)
- 在以下屏幕上选择自动搜索驱动程序。(Search automatically for drivers)
- 等待(Wait)Windows 10为您的显卡查找并安装更新的驱动程序。
- 安装驱动程序后重新启动 PC。
如果您有Nvidia显卡，您也可以手动更新显卡驱动程序。(update your graphics card drivers)
删除屏幕并重新添加它(Remove the Screen and Re-Add It)
当屏幕镜像在您的 PC 上停止运行时，最好从您的 PC 中移除外接显示器，然后重新添加它。这应该可以解决显示器的任何小问题，并允许您从头开始镜像屏幕。
- 按Windows + I键打开“设置”(Settings)应用。
- 在设置(Settings)窗口中选择设备。(Devices)
- 查找(Find)并选择您的外接显示器。
- 选择所选显示器下方的删除设备。(Remove device)
- 在打开的提示中选择“是”以从您的 PC 中删除选定的显示器。(Yes)
- 像之前一样将显示器重新添加(Re-add)到您的 PC。
在 Windows 10 上无法正常工作的屏幕镜像很容易处理(It’s Easy to Deal With Screen Mirroring Not Working on Windows 10)
如果您无法将 PC 的屏幕镜像到外接显示器，则很有可能您的 PC 上的某个选项已关闭。使用上述方法，您的屏幕镜像问题应该会消失。然后，您的所有 PC 内容都会显示在连接的电视或显示器上。
Screen Mirroring Not Working in Windows? Try These 7 Fixes
If screen mirroring is not working with your Windows 10 PC, several reasons could be behind it. Maybe a setting isn’t correct, or the right input mode on the TV isn’t selected, and so on.
Luckily, you can fix most of these issues by tweaking a few options here and there on your PC. We’ll show you how.
Use the Correct Input Mode on Your Screen/TV
Most monitors and TVs have multiple input modes that you can choose from. First, you need to select the mode that your Windows 10 PC is connected to.
For example, if your PC is connected to HDMI port number 2 on your TV, you should select that input mode number in the settings on your TV. This tells your TV what source to get the content from and display it on the screen.
Most TV remotes have an Input Mode or Source button. Press that button, choose the correct mode, and you’ll be good to go.
Restart Your Windows 10 PC to Get Around Screen Mirroring Problems
Sometimes, minor glitches on your Windows 10 PC that causes screen mirroring to not function. In these cases, a simple reboot usually fixes the problem.
To reboot your Windows PC, open the Start menu, select the power icon, and choose the Restart option.
When your PC restarts, reconnect your PC to your monitor, and screen mirroring should hopefully work.
Use Hardware and Devices Troubleshooter to Fix Screen Mirroring Not Working
An easy way to deal with most types of issues on your Windows 10 PC is to use a built-in troubleshooter. Windows 10 has many troubleshooters, and one of them is a Hardware and Devices troubleshooter. You can use this to find and fix issues with your devices, ultimately fixing your screen mirroring problems.
To use that troubleshooter:
- Open the Run box by pressing Windows + R keys simultaneously.
- Type the following command in the Run box and press Enter:
msdt.exe -id DeviceDiagnostic
- Select Next on the Hardware and Devices troubleshooter screen.
- Wait for the troubleshooter to find issues with your devices. The troubleshooter will then offer to fix those issues.
Once the issues are fixed, start screen mirroring, and it should work just fine.
Check If Your Windows 10 PC Supports Miracast
If you’re trying to mirror your Windows 10 PC’s screen to a wireless display, make sure your PC supports Miracast. Your PC must have this feature to cast the screen to external wireless displays.
There’s an easy way to check if your PC supports that feature:
- Open the Settings app by pressing Windows + I keys simultaneously.
- Select System on the Settings window.
- Choose Display from the left sidebar.
- Scroll down the right pane to the Multiple displays section. If you see a Connect to a wireless display option here, that means your PC supports Miracast.
- If you don’t see that option, your PC doesn’t support Miracast.
If your PC doesn’t support Miracast, you don’t have to be disappointed. You can still mirror your PC’s screen to your monitor but use a physical cable connection.
To do so, check the back of your monitor and see what cable types it supports. In most cases, you’ll find an HDMI port on your monitor. If this is the case, get an HDMI cable and use the cable to connect your PC to your monitor.
Then, instantly, you’ll see your PC’s screen on your connected monitor.
Enable Wi-Fi to Fix Screen Mirroring Issues
To wirelessly mirror your PC’s screen to a display, you must have Wi-Fi enabled on your PC. This is an essential prerequisite, yet many people forget about it. This will lead to screen mirroring not working.
To enable Wi-Fi on your PC:
- Open the Settings app by pressing Windows + I keys together.
- Select Network & Internet on the Settings window.
- Choose Wi-Fi from the sidebar on the left.
- Toggle on the Wi-Fi option on the right pane.
You’ll need to connect your PC to the same Wi-Fi network as your external wireless display to enable screen mirroring.
Update the Graphics Card Drivers
Outdated or faulty graphics card drivers cause various issues, including causing screen mirroring not to work on your PC. If this is the case with you, update the graphics card drivers to the latest versions, which should fix your problem.
The good thing is you can update the drivers automatically on your Windows 10 PC:
- Open the Device Manager by accessing the Start menu, searching for Device Manager, and selecting that tool in the search results.
- Find your graphics card in the Display adapters section on the Device Manager window.
- Right-click your graphics card and choose Update driver from the menu.
- Select Search automatically for drivers on the following screen.
- Wait for Windows 10 to find and install newer drivers for your graphics card.
- Restart your PC when the drivers are installed.
If you have an Nvidia graphics card, you can update your graphics card drivers manually, too.
Remove the Screen and Re-Add It
When screen mirroring stops functioning on your PC, it’s a good idea to remove the external display from your PC and then re-add it. This should fix any minor issues with the display and allow you to mirror the screen from scratch.
- Press the Windows + I keys to open the Settings app.
- Select Devices on the Settings window.
- Find and select your external display.
- Choose Remove device beneath your selected display.
- Select Yes in the prompt that opens to remove the selected display from your PC.
- Re-add the display to your PC as you did earlier.
It’s Easy to Deal With Screen Mirroring Not Working on Windows 10
If you can’t get your PC’s screen to mirror to your external monitor, there’s a good chance an option is off on your PC. Using the methods outlined above, your screen mirroring issues should be gone. You’ll then have all your PC’s content appear on your connected TV or monitor.
