Are you able to connect to your emby server from other devices, such as a smart phone?
Yes. My Samsung tablet. That's why I know the problem must be with the TV and not with the Emby server or firewall in my W10 PC. I've tried entering 4 or 5 UP address on my TV with no success. The WIFI signal on it is good (I'm getting streaming services). I called Samsu g support and was told it was Emby & not the TV. I tried loading Emby into the TV via USB stick, but nothing. Samsung support said that is for uploading systsm upgrades only.