FG-80E-POE and FG-81E-POE PoE controller firmware update
FortiOS 6.4.0 has resolved bug 570575 to fix a FortiGate failing to provide power to ports. The PoE hardware controller, however, may require an update that must be performed using the CLI. Upon successful execution of this command, the PoE hardware controller firmware is updated to the latest version 2.18:
diagnose poe upgrade-firmware