@amir.bendov 

Hello, do you mean your Samsung TV cannot connect to the wireless network of the router? If this is the case, please verify the below details and we will try to figure it out:

1. Are other wireless clients connecting to the router wireless fine? If not, you may need to check if the router is still working properly by logging into its web UI like below:

How to log into the web management page

2. Confirm there is a WAN IP address or not, if no, you need to check your internet connection:

What should I do if I cannot access the internet through Wi-Fi router?

3. If the internet is working fine, try to change the wireless channel and channel width on the router, then check again if your Samsung TV can connect:

Changing Channel and Channel Width on a TP-Link Router

​​​​​​​May it help.