The Samsung Galaxy Note 9 S Pen might stop functioning after a software update, and you can follow the info in this post in order to learn how to fix it.
The Galaxy Note 9 S Pen shouldn't end up not working, but this might still happen from time to time, and in case you cannot fix it then you should be finding useful info on how to troubleshoot this type of bug when encountered.
If the S Pen on the Galaxy Note 9 worked before the update, and it stopped after you've installed a fresh firmware version, then something must have went wrong during the update. You can choose to reinstall the update if you've done it manually, or you can choose to wait for a new firmware to be released over-the-air in your region and see if that fixes it. Note that these OTA updates are not rolled out that often, and you are better off trying to apply the changes we presented below.
NOTE: in case you've dropped your Galaxy Note 9 and the S Pen stopped functioning after that, then the problem is hardware-related, and you will need to take it to a professional repair shop and see if they can fix it.
How to Fix the S Pen "Not Working" Error on the Galaxy Note 9:
The first thing that you should try would be to reboot your phone or power it off for a couple of minutes and then boot normal mode and test the S Pen functionality again. If the problem doesn't go away after the reboot, then you will need to apply some extra steps.
Verify that Galaxy Note 9 S Pen is enabled in Settings:
Go to Settings> Advanced Features> open S Pen> S Pen Remote menu. Here you have to set the option switch to the ON position. This menu can be accessed via Notification toggles, too.
If you've made sure that the S Pen is connected with your Galaxy Note 9, and the problem is still there, then you will have to continue to the next tutorial.
Boot Galaxy Note 9 in Safe Mode:
You can try to boot your phone in Safe Mode and see if the S Pen problems are manifested when the device only loads the default system settings.
The Safe Mode on Samsung devices is going to load only the default options and apps that have come pre-installed with the phone. All the apps you have downloaded after you bought the phone will be disabled by default. If the S Pen works without any problems in Safe Mode, then some rogue app might interfere with its functionality when in normal mode.
Here's how to boot Safe Mode for Galaxy Note 9:
- press the Power button for a couple of seconds.
- when the Power options menu loads you will have to tap and hold the Power Off option.
- the icon will turn into a green Safe Mode one - tap it once in order to boot into that mode.
- wait for the phone to complete the boot and then start testing the S Pen functionality.
After you remove each app that you think might block the S Pen functionality, then you will have to boot in normal mode and test it there to see if the problem was fixed.
Wipe Galaxy Note 9 Cache Partition from Recovery Mode:
If the above tutorial didn't do anything for your Galaxy Note 9 and its S Pen still continue to malfunction, then you will have to try and wipe the cache partition and from Recovery Mode.
Boot Recovery Mode for Galaxy Note 9: power off the device; press and hold Volume Up + Bixby + Power buttons simultaneously; release the buttons when the screen turns blue and then wait for the Recovery Mode menu to load all of its options.
When in Recovery Mode you will have to select the "wipe cache partition" option. Confirm the process and then reboot the Galaxy Note 9 in normal mode to verify if the S Pen has been fixed.
If the problem continues to manifest, then the last thing you have to do would be to Factory Reset the phone.
Enter Recovery Mode and Factory Reset the Galaxy Note 9:
The Factory Reset process will wipe clean the entire device and all the installed apps from your phone. You will need to backup all the important data files before starting the factory reset.
If the factory reset doesn't fix the problems your Galaxy Note 9 S Pen, then you will have to take the phone to a service repair shop and see if they can fix it for you, as the problems might be hardware-related.
Here's how to factory reset:
- power off the phone.
- press and hold Volume Up + Bixby + Power at the same time.
- release the buttons when the screen turns blue.
- wait 30 seconds for the Recovery Mode menu to load.
- select 'wipe data/ factory reset' and confirm the process.
- reboot your Galaxy Note 9 in normal mode after the process is done.
These were all the steps you had to take in order to learn how you can fix your Galaxy Note 9 S Pen. If you still cannot fix the problem you're experiencing with the S Pen, then you will have to try and tell us in comments more about the problem you're having with it.