Can not cast YouTube to tv

[Zaid_AlKhafaji]

Hello 

I can't cast YouTube videos to tv since I change the router 

Are there specific settings should I made on router to enable this feature? 

Thanks 

[AndrewL]

@Zaid_AlKhafaji: Please can you confirm the model number of your TV, located on the sticker on the back of the device, and I can have a look into this for you. To screen mirror successfully, the phone and TV are required to be on the same network, therefore in the meantime please check your network settings on the TV to ensure that the new router is connected.

[Zaid_AlKhafaji]

The  model code : ua55ks8500

Both devices are connected to the same wifi as usual

[Zaid_AlKhafaji]

Still need answer 🤷‍♂️

[SanjayKurani]

It's because your devices on the wifi are running on different network frequencies (i.e. 5ghz and 2.5 ghz). Casting only works when the devices are on the same frequency of the wifi network. One simple fix to this problem is to connect your TV and modem via ethernet cable. This will fix the problem by making sure that your TV is running on the same frequency as your other devices.