Dear ClaireJD
Thanks for using Microsoft products and posting in the community.
If your Surface Book 3 is not charging properly even after trying a hard reset and using different chargers, here are some potential troubleshooting steps you can take to identify and possibly resolve the issue:
- Run the Surface Diagnostic Toolkit: Fix common Surface problems using the Surface app and Surface Diagnostic Toolkit - Microsoft Support
- Manually update Surface drivers and firmware: Download drivers and firmware for Surface - Microsoft Support
There's one last step you can take. If these steps don't resolve the problem, service and support options may be available to assist you. To learn more, go to How to get service or repair for Surface.
Best Regards,
Lizzie-Z | Microsoft Community Support Specialist