@Follet "The PoE Config is only available on TL-SG1016PE, TL-SG1218MPE and TL-SG1428PE." the manual says,

@pjm002 verify if all the leds flash correctly like described in the manual, ensure there is no addressing conflict by unplugging yourself and the device from the internet. set your device within the...

@Kosken are you sure ? or did you got a TL-SG105E v4.0 in a TL-SG2210P box? can you post a picture of the device you have and one of the bottom sticker? Those two are very different devices,

@yong_sa a 53.5 VDC power supply, rated at 1.31A at least.

@fourspoons if the IP address information changes..YES. otherwise NO.

@fourspoons well..the dhcp lease time is one hour.. then it is working as expected.. this is probably because your ISP has issues..the router should not ignore the lease time.