计算机的正确亮度级别是 PC 的基本要素，尤其是在您玩游戏、看电影和工作时。PC 的亮度负责根据环境亮度调整计算机的照明。然而，很少有用户报告一个常见问题，即升级 PC 或更新后Windows 10亮度无法正常工作的问题。(Windows 10)其他用户报告说，即使在调整后，亮度控制(brightness control)也始终设置为最高水平。如果您无法更改 Windows 10 的亮度(change brightness Windows 10)，则您的 PC 性能可能会受到影响，因为高亮度会降低电池性能(battery performance)。但是，几种故障排除方法可以修复Windows 10亮度不工作。阅读(Read)并按照本指南解决问题。
如何修复 Windows 10 亮度不起作用(How to Fix Windows 10 Brightness Not Working)
如果您无法在 PC、笔记本电脑或显示器上更改Windows 10的亮度，可能有多种原因。它们可以是软件相关的，也可以是硬件相关的，需要区分根本原因(root cause)进行整改。在大多数情况下，您可以自行解决问题，在某些情况下，您必须寻求专业帮助进行维修或更换(repair or replacement)。因此，在采取高级措施之前，值得分析问题的根本原因(root cause)。
- 如果您的 PC 遭受物理损坏、老化因素等时显示器出现问题，则您可能在调整(display)亮度控制(brightness control)时遇到问题。
- 如果您的软件已过时(outdated)或显卡驱动程序未更新，您将无法更改Windows 10的亮度。更新您的设备和驱动程序(device and drivers)以解决问题。
- 如果您使用键盘命令来控制亮度，则键盘问题(keyboard issues )可能会导致Windows 10亮度不起作用。
在本节中，我们汇总了修复Windows 10亮度不工作问题的方法列表。这些方法是根据问题的严重性和故障排除策略的效率来安排的。以相同的顺序遵循它们以获得最佳结果。
方法 1：运行 Windows 疑难解答(Method 1: Run Windows Troubleshooter)
运行电源故障排除(Power Troubleshooter)程序将解决您 PC 中的任何故障，此方法不仅适用于Windows 10，还适用于Windows 7和 8。
1. 同时按下Windows + R keys打开运行(Run)对话框。
2.输入ms-settings:troubleshoot并按Enter 键(Enter key)。
注意：(Note:)对于OS 10之前的(OS 10)Windows版本，键入命令 control.exe /name Microsoft.Troubleshooting而不是ms-settings:troubleshoot并按Enter。
3. 单击其他疑难解答(Additional troubleshooters)。
4. 选择电源(Power)并运行疑难解答(Run the troubleshooter)。
5. 等待该过程完成，如果在您的系统中发现任何问题，请单击应用此修复程序(Apply this fix )并按照后续提示中给出的说明进行操作。
6. 最后，重启你的电脑(restart your PC)。
注意：(Note: )如果您没有通过此故障排除方法获得任何修复，请执行其他故障排除步骤。
1. 同时按下Windows + R 键(keys)启动运行(Run)对话框。
2. 键入msdt.exe -id DeviceDiagnostic并按Enter 键(Enter key)。
2. 单击下一步(Next)。
3. 有时，如果您的设备没有安装最新的驱动程序，您会收到以下提示。如果您愿意，您可以完成驱动程序和更新的安装。按照屏幕上的说明进行操作，然后重新启动(Restart)您的设备。
故障排除过程(troubleshooting process)通常会修复Windows 10亮度不工作问题。
4A。此过程可让您知道它是否可以识别并解决问题。
4B。但是，如果无法识别问题，则会出现以下屏幕。
方法 2：更新或重新安装显示适配器驱动程序(Method 2: Update or Reinstall Display Adapter Drivers)
请按照以下步骤更新或重新安装显示适配器(display adapter)驱动程序。
选项 I：更新显示适配器驱动程序(Option I: Update Display Adapter Drivers)
尝试将驱动程序更新到最新版本以修复Windows 10亮度不起作用。您也可以卸载显卡驱动程序并重新安装，而不是使用以下步骤更新驱动程序。在这两种情况下，最终结果将是相同的。
1. 在Windows 10搜索菜单中键入设备管理器。(Device Manager)
2. 双击显示适配器(Display adapters)展开它。
3. 右键单击您的视频卡驱动程序(your video card driver)（例如Intel(R) HD Graphics 620）并单击更新驱动程序(Update driver)。
4. 单击浏览我的计算机以查找驱动程序(Browse my computer for drivers )以手动查找并安装驱动程序。
5. 单击浏览..(Browse.. )按钮选择任何目录。单击(Click)下一步(Next)。_
6. 最后，单击关闭(Close )按钮退出窗口。
7.重新启动(Restart )计算机，并检查您是否已修复Windows 10亮度在您的系统中不起作用的问题。
选项二：重新安装显示适配器驱动程序(Option II: Reinstall Display Adapter Drivers)
如果更新驱动程序无法解决问题，您可以卸载显示适配器(display adapter)驱动程序并重新安装。按照下面提到的步骤来实现相同的。
1. 使用2A(2A)中提到的步骤启动设备管理器(Device Manager )，然后双击展开显示适配器。(Display adapters )
2. 右键单击驱动程序(driver )并选择卸载设备(Uninstall device)。
3.屏幕上会出现警告提示。(warning prompt)选中“删除此设备的驱动程序软件”(Delete the driver software for this device)框，然后单击“(box “)卸载(Uninstall)”确认提示。
4. 通过手动更新或自动更新在您的设备上下载并安装驱动程序。
5. 访问制造商的网站(manufacturer’s website)。
2.在您的PC上找到(Find)并下载与(Download )Windows版本(Windows version)对应的驱动程序。
3. 下载后，双击下载的文件(downloaded file)并按照给定的说明进行安装。
4. 对所有设备驱动程序（如音频、视频、网络等）执行相同的步骤。
检查您的系统中是否已修复Windows 10亮度不工作问题。
另请阅读：(Also Read:)修复计算机在Windows 10中无法进入(Windows 10)睡眠模式(Sleep Mode)
方法 3：使用 Microsoft 基本显示适配器(Method 3: Use of Microsoft Basic Display Adapter)
如果显示适配器(Display adapter)驱动程序不可用或未安装在您的 PC 上，您可以使用内置的Windows 驱动程序(Windows driver)软件。您可以使用此驱动程序解决Windows 10亮度不工作问题。以下是演示如何在您的 PC 上使用Microsoft Basic Display 适配器的几个步骤。(Microsoft Basic Display adapter)
1.如方法2A( Method 2A )所示打开设备管理器(Device manager )，点击显示适配器(Display adapter)下的更新驱动程序(Update driver )。
2. 单击浏览我的计算机以查找驱动程序(Browse my computer for drivers )以手动查找并安装驱动程序。
3. 单击让我从计算机上的可用驱动程序列表中选择(Let me pick from a list of available drivers on my computer)。
4. 选择框，显示兼容硬件。(Show compatible hardware.)单击Microsoft 基本显示适配器(Microsoft Basic Display Adapter)，然后单击下一步(Next)。
5. 将显示提示，Windows 已成功更新您的驱动程序(Windows has successfully updated your drivers)。
6. 最后，重新启动您的 PC 并检查您是否已解决问题。
方法 4：调整电源选项设置(Method 4: Tweak Power Option Settings)
如果您无法更改Windows 10的亮度，您可以通过禁用电源(Windows 10)后关闭显示(Turn off display after)选项来修复它，如下所述。
注意：(Note: )您还可以在搜索栏中键入编辑电源计划(edit power plan )以打开“编辑计划设置”窗口（(the Edit Plan Settings window ()跳过步骤 1 和 2）。
1. 按Windows + R key并键入powercfg.cpl并按Enter 键(Enter key)。
2. 选择更改计划设置(Change plan settings )选项。
注意(Note)：如果您的系统中有多个电源计划处于活动状态，请对所有多个活动计划重复相同的过程。
3. 单击更改高级电源设置(Change advanced power settings)。
4. 在这里，在高级设置(Advanced settings )菜单中，通过单击+图标展开显示选项。(Display )
5.通过单击+ 图标展开关闭显示后选项。(Turn off display after )
6. 单击On battery并从下拉列表中将设置更改为Never 。
7. 单击已插入(Plugged in )并将设置更改为从不。(Never.)
8. 单击应用(Apply )和确定( OK )以保存更改。
9.重新启动(Restart)系统并检查问题是否已解决。
注意：(Note: )如果您在Display下找到(Display, )Adaptive Brightness选项，请按照相同的步骤将On battery和Plugged in值设置为OFF。
另请阅读：(Also Read:)修复PC打开但没有显示
方法 5：重新启用即插即用监视器（适用于 PnP 监视器）(Method 5: Re-enable Plug and Play Monitor (for PnP monitors))
如果您使用即插即用(Plug and Play)( PnP ) 显示器并且无法更改 Windows 10 的亮度(change brightness Windows 10)，则此方法适合您。任何更新或驱动程序本身都会将其禁用，从而导致 Windows 10 亮度不工作问题。确保您的设备上是否禁用了PnP 监视器是一个不错的选择。(PnP monitor)
选项 I：启用 PnP 监视器(Option I: Enable PnP monitors)
1. 如方法 2A(Method 2A)所示启动设备管理器(Device manager )并导航到监视器(Monitors )部分。
一种
2. 双击监视器(Monitors )将其展开。
3. 右键单击 Generic PnP Monitor并选择Enable device。
注意：(Note: )如果您没有看到启用设备(Enable device )选项，则您的 PC 没有禁用的通用 PnP 监视器。(Generic PnP Monitor. )在这种情况下，您可以直接跳到下一个方法。
4. 最后，重新启动您的 PC 并检查您是否已解决问题。
选项二：卸载 PnP Monitors 下的隐藏设备。(Option II: Uninstall hidden devices under PnP Monitors.)
1. 如方法 2A(Method 2A)所示打开设备管理器(Device Manager)并导航到查看(View )选项卡以选择显示隐藏的设备(Show hidden devices )。
6. 展开监视器(Monitors)部分，将显示隐藏监视器列表。
注意：(Note:) 隐藏(Hidden)的监视器会比真实的监视器看起来是半透明的。
7. 右键单击所有半透明显示器并选择卸载设备(Uninstall device )选项。重复此步骤，直到删除所有隐藏的PnP监视器。
另请阅读：(Also Read:)如何在Windows 10中更改(Windows 10)屏幕亮度(Screen Brightness)
方法 6：调整注册表编辑器设置(Method 6: Tweak Registry Editor Settings)
如果您是ATI 用户(ATI user)并且您的设备上安装了Catalyst ，则由于(Catalyst)Catalyst 版本 15.7.1(Catalyst version 15.7.1)中的错误，您无法更改 Windows 10 的亮度。要解决此问题，请按照以下步骤操作。
1. 同时按Windows + R key运行(Run)对话框。
2.输入regedit并按Enter 键(Enter key)。
3.在注册表编辑器中导航到以下路径。(path)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
3. 双击以下这些键（如果有） 并将其值设置为 0， (set their value to 0 )然后单击OK：
- MD_EnableBrightnesslf2
- KMD_EnableBrightnessInterface2
4.再次(Again)，导航到以下关键文件夹路径(path)：
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001
5. 双击以下这些键（如果有） 并将它们的值设置为 0， (set their value to 0 )然后单击 OK：
- MD_EnableBrightnesslf2
- KMD_EnableBrightnessInterface2
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我们希望本指南对您有所帮助，您可以修复Windows 10 亮度不工作(Windows 10 brightness not working)的问题。让我们知道哪种方法最适合您。此外，如果您对本文有任何疑问/建议，请随时将它们放在评论部分。
Fix Windows 10 brightness Not Working
Τhe correct brightness leνel of your cоmputer is an essential element in your PC, especially when you play games, wаtch moνies, and work. The brightness of your PC iѕ responsible for adjusting the lighting of the computer in accordancе with the environmentаl brightness. Yet, few υsers report a common problem, Windows 10 brightneѕs not working issυe after upgrading your PC or after updating it. Other users reported that the brightness control is always set to a maximum level even after adjusting it. If you can’t change brightness Windows 10, the performance of your PC might be affected since heavy brightness will lower the battery performance. However, several troubleshooting methods fix Windows 10 brightness not working. Read and follow this guide to fix the issυe.
How to Fix Windows 10 Brightness Not Working
If you can’t change the brightness of Windows 10 on your PC, laptop, or monitor, it could be due to several reasons. They can be either software-related or hardware-related, and it is necessary to distinguish the root cause to rectify the same. In most cases, you can fix the issue by yourself, and in some cases, you must seek professional help for repair or replacement. Therefore, it is worth analyzing the root cause of the problem before taking advanced action.
- If there is a problem with your display when your PC has suffered physical damage, aging factors, etc., you might have a problem adjusting brightness control.
- If your software is outdated or the graphics drivers are not updated, you can’t change the brightness of Windows 10. Update your device and drivers to resolve the issue.
- If you use keyboard commands to control brightness, keyboard issues might cause Windows 10 brightness not to work.
In this section, we have compiled a list of methods to fix Windows 10 brightness not working problem. The methods are arranged according to the severity of the problem and the efficiency of their troubleshooting tactics. Follow them in the same order to attain the best results.
Method 1: Run Windows Troubleshooter
Running the Power Troubleshooter will resolve any glitches in your PC, and this method is applicable not only for Windows 10 but also for Windows 7 & 8.
1. Press Windows + R keys simultaneously to open the Run dialog box.
2. Type ms-settings:troubleshoot and hit Enter key.
Note: For Windows versions earlier to OS 10, type the command control.exe /name Microsoft.Troubleshooting instead of ms-settings:troubleshoot and hit Enter.
3. Click Additional troubleshooters.
4. Select Power and Run the troubleshooter.
5. Wait for the process to be completed, and if any issue is found in your system, click on Apply this fix and follow the instructions given in the successive prompts.
6. Finally, restart your PC.
Note: If you did not attain any fix by this troubleshooting method, then, follow the additional troubleshooting steps.
1. Press Windows + R keys together to launch the Run dialog box.
2. Type msdt.exe -id DeviceDiagnostic and hit Enter key.
2. Click on Next.
3. Sometimes, if your device is not set up with latest drivers, you will receive the following prompt. You may finish installing drivers and updates if you want to do so. Follow the on-screen instructions, and then Restart your device.
The troubleshooting process will often fix Windows 10 brightness not working issue.
4A. This process lets you know if it could identify and fix the problem.
4B. However, the following screen will appear if it could not identify the issue.
Method 2: Update or Reinstall Display Adapter Drivers
Follow these steps to update or reinstall display adapter drivers.
Option I: Update Display Adapter Drivers
Try updating the drivers to the latest version to fix Windows 10 brightness not working. You can also uninstall your graphics card driver and reinstall it again rather than updating the driver using the below-mentioned steps. In both cases, the net result will be the same.
1. Type Device Manager in the Windows 10 search menu.
2. Double click on Display adapters to expand it.
3. Right-click on your video card driver (e.g. Intel(R) HD Graphics 620) and click on Update driver.
4. Click on Browse my computer for drivers to locate and install a driver manually.
5. Click on the Browse.. button to choose any directory. Click on Next.
6. Finally, click on the Close button to exit the window.
7. Restart the computer, and check if you have fixed Windows 10 brightness not working in your system.
Option II: Reinstall Display Adapter Drivers
If updating drivers does not give you a fix, you can uninstall the display adapter drivers and install them again. Follow the below-mentioned steps to implement the same.
1. Launch the Device Manager using the steps mentioned in 2A and expand Display adapters by double-clicking on it.
2. Right-click on the driver and select Uninstall device.
3. A warning prompt will be displayed on the screen. Check the box “Delete the driver software for this device” and confirm the prompt by clicking Uninstall.
4. Download and install the drivers on your device either by a manual update or automatic update.
5. Visit the manufacturer’s website.
2. Find and Download the drivers corresponding to the Windows version on your PC.
3. Once downloaded, double click on the downloaded file and follow the given instructions to install it.
4. Follow the same steps for all device drivers such as audio, video, network, etc.
Check if you have fixed Windows 10 brightness not working issue in your system.
Also Read: Fix Computer Won’t Go to Sleep Mode in Windows 10
Method 3: Use of Microsoft Basic Display Adapter
If the Display adapter driver is unavailable or not installed on your PC, you can use an inbuilt Windows driver software. You can use this driver to resolve Windows 10 brightness not working issue. Here are a few steps demonstrating how to use the Microsoft Basic Display adapter on your PC.
1. Open Device manager as shown in Method 2A and click on Update driver under Display adapter.
2. Click on Browse my computer for drivers to locate and install a driver manually.
3. Click on Let me pick from a list of available drivers on my computer.
4. Select the box, Show compatible hardware. Click on Microsoft Basic Display Adapter and click on Next.
5. A prompt, Windows has successfully updated your drivers will be displayed.
6. Finally, restart your PC and check if you have fixed the issue.
Method 4: Tweak Power Option Settings
If you can’t change the brightness of Windows 10, you can fix it by disabling the Turn off display after power option, as discussed below.
Note: You can also type edit power plan in the search bar to open the Edit Plan Settings window (Skip Steps 1 & 2).
1. Press Windows + R key and type powercfg.cpl and hit Enter key.
2. Select the Change plan settings option.
Note: If you have multiple power plans active in your system, repeat the same procedure for all the multiple active plans.
3. Click on Change advanced power settings.
4. Here, in the Advanced settings menu, expand the Display option by clicking on the + icon.
5. Expand the Turn off display after option by clicking on the + icon.
6. Click on On battery and change the setting to Never from the drop-down list.
7. Click on Plugged in and change the setting to Never.
8. Click on Apply and OK to save the changes.
9. Restart your system and check if the issue is solved now.
Note: If you find the Adaptive Brightness option under Display, follow the same procedure and set the On battery and Plugged in values to OFF.
Also Read: Fix PC Turns On But No Display
Method 5: Re-enable Plug and Play Monitor (for PnP monitors)
If you use a Plug and Play ( PnP) monitor and if you can’t change brightness Windows 10, this method is for you. Any updates or the driver itself disables it, causing Windows 10 brightness not working issue. It is a good choice to make sure if the PnP monitor is disabled on your device.
Option I: Enable PnP monitors
1. Launch Device manager as shown in Method 2A and navigate to the Monitors section.
2. Double-click on Monitors to expand it.
3. Right-click on Generic PnP Monitor and select Enable device.
Note: If you do not see Enable device option, your PC does not have a disabled Generic PnP Monitor. In this case, you can directly skip to the next method.
4. Finally, restart your PC and check if you have fixed the issue.
Option II: Uninstall hidden devices under PnP Monitors.
1. Open the Device Manager as shown in Method 2A and navigate to the View tab to select Show hidden devices .
6. Expand the Monitors section, and a list of hidden monitors will be displayed.
Note: Hidden monitors will appear translucent than the real ones.
7. Right-click on all the translucent monitors and select Uninstall device option. Repeat this step until you delete all the hidden PnP monitors.
Also Read: How to Change Screen Brightness in Windows 10
Method 6: Tweak Registry Editor Settings
If you are an ATI user and if you have Catalyst installed on your device, you can’t change the brightness Windows 10 due to a bug in Catalyst version 15.7.1. To resolve the problem, follow the below-mentioned steps.
1. Open the Run dialog box by pressing Windows + R key together.
2. Type regedit and hit Enter key.
3. Navigate to the following path in your registry editor.
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
3. Double-click on these following keys (if any) and set their value to 0 then click OK:
- MD_EnableBrightnesslf2
- KMD_EnableBrightnessInterface2
4. Again, navigate to the following key folder path:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001
5. Double-click on these following keys (if any) and set their value to 0 then click OK:
- MD_EnableBrightnesslf2
- KMD_EnableBrightnessInterface2
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We hope that this guide was helpful and you could fix Windows 10 brightness not working. Let us know which method worked for you the best. Also, if you have any queries/suggestions regarding this article, then feel free to drop them in the comments section.
