1, usb power supply is insufficient or unstable.
1, desktop computer can be connected to the usb port on the back of the chassis usb port.
2, the notebook can only replace the other usb port, you can use the USB3.0 interface.
2, usb interface cable quality problems.
1, if the quality of the usb interface cable is not good will lead to insufficient power supply or instability, replace the quality of a better try.
2, the interface is loose can also lead to this phenomenon, if the network cable crystal head card fell or stuck on the network card interface, this phenomenon will also occur.