[FSD-803PE] FSD-803PE's POE LED always blinking and can not boot up the Switch?

FSD-803PE only requires one power source, i.e. from POE or from 12V DC. By default, POE will be the first priority. However, if the POE device cannot provide sufficient power from the injector, or 12V DC power is just removed from the DC-jack, the "POE" LED will blink.
1. Powered from POE: please consult the network administrator if the POE device can provide the sufficient current or not.

2. Powered from 12VDC then POE: please remove all the power connection, i.e. both DC plug and port#1. And re-connect the port#1 to force the Switch detect its power system again.