USB port cannot output

Troubleshooting steps:

① Check whether the USB port is damaged (deformation, pin damage, or a broken rubber tongue can prevent connection).

② Ensure that the USB port is connected with the device and port securely, and the charging cable is intact.

③ Check the battery level of power supply (there is no output when the remaining battery level is 0%).

④ Confirm whether the device power exceeds the nominal power of the USB port (overload will trigger protection).