What if the headphone is unable to turn on, or turn on without flashing?

1.Maybe the headphone is out of power that it needs to be fully charged. If charged for more than 30 minutes and there is still no light flashing. Maybe there is something wrong with the battery.

2.There is something wrong with chip data. You can try to restore the factory default settings.

3.Exclude human factors (such as water damage, getting wet, and so on).