I would double check the network configuration on your TV. Make sure it's set to automatic IP/DHCP, and that the DNS are also set to either automatic, or a well-known public one like Google (126.96.36.199).
Asuswrt-Merlin: Customized firmware for Asus routers
Github: github.com/RMerl - Twitter: RMerlinDev
See the sticky post for more info.