Why Lenovo Brightness not Working?

If you are a Lenovo laptop user, then you may have confronted a very bothersome error that the Lenovo brightness not working Windows 10 Operating System. Moreover, some Lenovo laptop users have reported that the screen of their Lenovo laptop might appear very dim after upgrading to the Windows 10 OS successfully. Generally, this error notification arises after you accidentally press a wrong key on the keyboard or you just finish updating your Windows 10 Operating System.

Hence, if you are struggling with this Lenovo laptop screen brightness not working error notification, then the following troubleshooting ways will help you get rid of this error on the go.

Here, in this post, we have managed to recognize some easy troubleshooting hacks that have been useful for other Lenovo laptop users encountering the same issue. So, try all the hacks given below carefully

Lenovo Laptop Screen Brightness not Working on Windows 10 OS

You may come up with the several fixes to fix this error notification. But, you need to execute some ways which can ensure the optimal solution in no time. However, this Lenovo brightness not working error notification on the Windows 10 Operating System can be easily eradicated by the below-suggested troubleshooting hacks as discussed in the following section. Therefore, without hesitating too much, let’s get into the fixes directly to fix this error.

Way 1: Press Brightness-Up Key when Starting Up

This is the most fundamental method that you should try to get rid of this annoying error notification. Therefore, press the brightness-up key when starting up. To do so, follow the steps below:

  1. At first, you need to completely shut down the Lenovo laptop.
  2. After that, press down the power button of the Lenovo laptop to start up your laptop. Press down and hold the brightness-up key on your keyboard, In the meantime, which is basically a function key (F1-F12).
  3. Now, your laptop will start up.
  4. After that, wait for a minute while.
  5. After the complete start-up, you need to check the Lenovo laptop to verify that the problem is resolved or not. In case, if the issue still persists, then you need to move out to the next troubleshooting method.

Way 2: Modify the Registry Value

You can easily change a registry value of the system to get rid of this error notification. But, before proceeding further you need to keep in your mind that modifying the registry values is very risky. You need to be extra careful while executing this method because any misoperation can bring about unexpected and troublesome outcomes. To modify the registry value of the system, go through the following steps below:

  1. Press the Windows logo key and the R key at the same time on the keyboard. Doing so will help you to invoke the Run dialog box.
  2. Go to the Run dialog box and write ‘regedit’ in the box. Tap on the Ok button. Alternatively, you can also press down the Enter key on your keyboard.
  3. This will invoke the Registry Editor.
  4. Utilize the registry hive on the left panel on the Registry Editor to navigate to the following location: “HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000” OR “HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001“.
  5. Now, you need to find FeatureTestControl.
  6. Double-click on the FeatureTestControl.
  7. After that, modify the registry value data to ‘f048’. Then, tap on the Ok button to proceed further.
  8. After completing all the above-described steps, close the Registry Editor.
  9. At last, restart the Lenovo laptop.

Once done, you need to check the Lenovo laptop and verify if the error notification has been resolved or not. In case, if the issue still persists then, it is advised to proceed with the next troubleshooting method.

Way 3: Verify the Adaptive Brightness is Disabled

The adaptive brightness is an effective featured tool of the Windows 10 Operating System. Sometimes, this tool drives to a fixed brightness even if one sets the brightness. To verify the adaptive brightness is disabled, follow-through the below mentioned steps:

  1. At first, go to the Taskbar of the system.
  2. After that, right-click on the battery icon in the Taskbar. Next, tap on the  ‘Adjust screen brightness’ option.
  3. Now, tap on the ‘Change plan settings’ option of the recent plan of the power.
  4. Click on the Change advanced power settings option to proceed further.
  5. Now, you will get a popup window on the screen. Tap on the Display option. After that, enable adaptive brightness under the extended list of options. Next, you need to choose the turn “off” option for both the option ‘plugged in’ and ‘on battery’.
  6. Tap on the Apply button to save the changes that you have made.
  7. After completing all the above-described steps, restart the system for good measure.

Lastly, you need to check the Lenovo laptop to verify that the problem is resolved or not. In case, if the issue still persists, then you need to move out to the next troubleshooting method. 

Way 4: Upgrade the Display Adapter Drivers

In case, if the above-mentioned method did not work for you. Then, you need to perform this effective method to get rid of this annoying error notification. By upgrading the display adapter drivers, you can easily fix several minor bugs of your Lenovo laptop. Therefore, to update the display adapter driver, follow the below steps:

  1. At first, tap on the Start menu and tap on it to open. After that, choose the  Device Manager option.
  2. Alternatively, go to the Taskbar of the system and search for the ‘Device Manager’ option. After that, tap on the top result.  
  3. Expand the Display Adapter option and right-click on the Graphics Card driver.
  4. Then, tap on the ‘Update Driver Software’ option.
  5. After choosing the ‘Update Driver Software’ option, you will get a popup box on the screen. Next, you need to tap on the ‘Search automatically for updated driver Software’. Option. Now, the system will start the searching process for the updated drivers. The latest and updated driver will be downloaded and installed on the system automatically.
  6. This process may take some time to complete. Therefore, you need to wait until the entire process completes.
  7. Once the process is done, the popup will show up again. So, you need to close the pop-up.
  8. Go to the Menubar which is located on the top.
  9. After that, choose the Action option in the Menubar. Tap on the ‘Scan for hardware changes’ option under the Action menu. Soon, the scanning process will start. So be patient and wait till the task completes. This process will identify any changes in the system due to the updated driver.
  10. After completing all the above-mentioned steps, restart the system and check if the issue resolved.

Way 5: Enable Generic PnP Monitor

This issue may arise because of the Generic PnP Monitor of the system. Moreover, the Generic PnP Monitor might get turned off due to the installation of a new application which can conflict with Generic PnP Monitor. To enable the Generic PnP Monitor, you need to follow some easy steps.

  1. At first, go to the Start menu and tap on it to open. After that, choose the  Device Manager option.
  2. Alternatively, go to the Taskbar of the system and search for the ‘Device Manager’ option. After that, tap on the top result.
  3. Tap on the Monitors option. After that, choose the Generic PnP Monitor in the Monitors option. This process will verify that the Generic PnP Monitor is enabled or not.    
  4. In case, if you find that the Generic PnP Monitor is not enabled. Then, tap on the Enable option. Also, you need to verify for the available updates and update it to the latest or updated version.
  5. Next, tap on the Action option. After that, choose the Scan for hardware changes option.
  6. To apply the changes that you have made, you need to restart the system.
  7. After completing all the above-mentioned steps, try to check the system that the error notification is resolved or not. In case, If the issue still continues, then it is advised to check out to the next method.

Way 6: Adjusting the Brightness from Power Options

Sometimes, this error notification may occur because of the brightness settings bug. Moreover, this brightness settings bug can be easily eradicated by tweaking some power options settings.

Here’s a quick guide to resolve the brightness not working error notification on the Windows 10 Operating system through Power options:

  1. Press the Windows logo key and the R key at the same time on the keyboard. Doing so will help you to invoke the Run dialog box.
  2. Go to the Run dialog box and write ‘powercfg.cpl’ in the box. Tap on the Ok button. Alternatively, you can also press down the Enter key on your keyboard.
  3. This process will open the Power options menu.
  4. Tap on the Change plan Setting option in the Power options menu.  
  5. After that, select the Change advanced power settings option.
  6. Next, scroll down to Display and choose the “+” icon to expand the drop-down menu in the next screen. Now, expand the Display brightness menu and adjust the values by manually.
  7. You need to repeat the process described in step 6 if you are facing the dimmed brightness issue on your Lenovo laptop. After that, ensure that the Enable Adaptive Brightness option is Turned off.
  8. After completing all the above-mentioned steps, tap on the apply button to save the changes that you have made.
  9. Now, the brightness of the screen should be properly adjusted to the values that you earlier set.

Wrapping Up…

Here, in this context, we have described the most effective and easiest troubleshooting hacks by which you can easily diagnose this annoying Lenovo laptop screen brightness not working error on the Windows 10 Operating System. Moreover, this article assists non-tech-savvy persons. Thus, you do not require any extra technical knowledge or ideas to execute the above-mentioned ways. In case, you face any difficulty or trouble, then please let us know in the comment section below.

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