Troubleshooting
The Power LED should be lit up when the power system works normally. If the 
Power LED worked abnormally, please check as follows:
Make  sure  that  the  power  cable  is  connected  properly,  and  the  power 1. 
contact is normal.
Make sure  the  voltage  of the  power supply  meets  the requirement  of the 2. 
input voltage of the Switch.
Please check as follows:
Make sure that the cable connectors are firmly plugged into the switch and 1. 
the device.
Make sure the connected device is turned on and working well.2. 
The cable must be less than 100 meters long(328 feet).3.