[FSD-803PE] The Power LED of FSD-803PE does not turns on?

FSD-803PE supports two power sources, 12VDC and 802.3af, please check which kind of power system deployed.
1. Powered from POE: please check with network administrator if the POE injector device is complied with 802.3af standard and well connected to port#1 of the Switch with 4-pair UTP cable within 100 meters. FSD-803PE will detect the signal from 802.3af POE device and response to get the 48VDC power. Connect with non-802.3af complied injector to port#1 could damage the Switch permanently.

2. Powered from 12VDC: the Switch supports 12VDC AC adapter. Please check the AC adapter complies with 12V DC output. Incorrect DC power to the Switch, higher voltage could damage the Switch, and lower voltage will not power on the Switch.