If your S Pen is not working, there are some troubleshooting tips to try to get it working again in no time.
Samsung Support: How to troubleshoot your S Pen
Cult of Android - Galaxy Note 5 teardown explains S Pen jams
Galaxy Note 5 design flaw: A backwards S-Pen can permanently damage the device [Updated]
Common Solutions If Your S-Pen Stops Working
Surface Pen Not Working? Here's How to Fix It
S pen disconnected. Last night I encountered this conspicuous problem: pairing the s pen with the phone. It suddenly refuses to pair & failed to reset. I've tried restarting the phone and
7 Best Ways to Fix S Pen Not Working on Samsung Galaxy Devices - Guiding Tech
Does Samsung S-Pen work on any phone? - Quora
S Pen is not recognized by Galaxy phone or tablet
How to Adjust Your Samsung Galaxy Note's S-Pen Sensitivity for Better Touch Response
16 Best Ways to Fix Samsung S Pen Disconnected or Not Working - TechWiser
How To Fix Galaxy Note10 S Pen Not Working
How to Use S Pen to Take Pictures on Samsung Galaxy Phones - TechWiser
Samsung fixes the Galaxy Note 5's backwards pen problem