A restart of your Router and Device solves 90% of Issues!
Before proceeeding to troubleshoot any issues, please perform a restart on your equipment.
Power off your router, pull the plug for 1 min and power on again. This will clear the cache from your router. Then turn your TV box or Smart TV off, pull the plug for 1 minute and turn and back on. This will clear out all the old cache settings from your router and device and should provide a fresh connection.
This is often the solution to a lot of problems and is essential before other troubleshooting can begin.