If your BTS light stick stopped working, you should first check the battery, because sometimes it just needs to be charged or replaced with new ones 💡.
When you are sure the battery is fine, you might want to check if the light stick is properly connected to any power source or if there are any loose parts that need to be fixed 🔧.
If none of these solutions work, it could be a problem with the light stick itself, so you might need to contact the seller or the manufacturer for help or to ask about getting it repaired or replaced 📞.
You can also try resetting the light stick if it has that option, as sometimes this can fix any software issues that might be causing the problem 🔄.
If you are still having trouble, joining a BTS fan community or forum might be helpful, as other fans might have had similar issues and can offer advice or solutions 🤝.