I'm guessing that's a modem/router combo. Google doesn't have much on that model. Are you sure that's the correct make/model?
Most of the time, routers are set to use DHCP. You'd need to go into the modem/router's configuration page. You should also check the number of network clients allowed. That should be listed along with the DHCP settings.
You would need to look at the TV's network settings to find out the IP info. Post the make/model of the TV.
>I'm guessing that's a modem/router combo.
Yeah, I would think so. Yes, I'm certain of the model.
>You'd need to go into the modem/router's configuration page
I'm reluctant to do that because 1) I don't know what I'm doing, and 2) everything's been fine for 10 years.
I will try to find out what the TV is set to. It's a Samsung 5 Series UN50J5550AF.
I can't find any manuals for that modem/router. Usually, the config page would be something like http://192.168.1.1. You wouldn't be changing any settings, just looking. I'm pretty sure it is set to DHCP. If you were using static IPs, you would know.
It's possible that the number of DHCP clients is set really low, so that might cause conflicts. It's kind of like musical chairs. You already have at least 4 clients, not counting smartphones or things like that.
According to that, the modem/router is at 192.168.1.254. Your client IP is 192.168.1.66. You're definitely using DHCP.
I've never worked with a Huawei router before, but I'd guess the config page is at http://192.168.1.254
You'd want the number of DHCP clients allowed on the router to be higher than the number of actual devices.
Where are you seeing the IP conflict error, on a computer or on the TV? Most devices should know if their old IP (lease) is being used, so they would just try to obtain a new IP.