Hello Marcel,
Thank you so much for posting in Microsoft Community.
I appreciate you raising this concern to us, and I understand that you’re having trouble charging your Surface Slim Pen 2. You got me here; we'll definitely sort this issue together.
Initially, I wanted to share an information that the keyboard you are using is a Surface Pro Signature Keyboard (Buy Surface Pro Signature Keyboard - Cover with Backlit Keys | Microsoft Store) where it is compatible to Surface Pro 8 and where you can charge your Surface Slim Pen 2. On the other hand, the one you mentioned Surface Pro Signature Type Cover is a different variant and is not compatible with your Surface Pro 8 (Surface Pro Signature Type Cover - Microsoft Store). Thus, I am expecting you are referring to the Surface Pro Signature Keyboard.
Going back to the issue, since you were able to try charging your Slim Pen 2 to a different keyboard, possible that the problem is your Surface Pro Signature Keyboard. Thus, here are some troubleshooting steps you may try to fix the issue:
- Check for updates: Ensure that your Surface Pro 8 is up to date with the latest software updates. To check for updates, select Start > Settings > Windows Updates > Check for updates. Install any available updates and keep your accessory connected until the update finishes. Restart device after.
- Try to detach the keyboard and attach it after. Restart device once again.
- Check the charging port: Ensure that the charging port on your Surface Pro 8 is clean and free of debris. If there is any dirt or debris, use a soft-bristled brush to clean it.
- You may also try attaching your Surface Pro Signature Keyboard to your friend's Surface device and try to charge the Pen. See if the issue persists.
- Download drivers and firmware for your Surface Pro 8: Download Surface Pro 8 Drivers and Firmware. from Official Microsoft Download Center
Please let me know how it goes and hopefully it helps!
Best regards,
Rolando S.