Tv wont connect

[Brackenmyst]

The downstairs tv and upstairs alexa lights and laptop connect to the router.  However my Samsung tv upstairs refuses completely.  It's not old (3 at most). I have tried changing the WPA settings,  turning off and on along with router and I have put the password in about 10 times to no avail.  It doesn't recognise the IP address when I try to set it up manually either.  Tell me what I'm doing wrong please? 

[Chrisee]

@Brackenmyst power down the TV fully and leavecthe power disconnected for a minute or until the LED goes out before reconnecting ..That step should force the TV to reboot which should clear the memory used to store passwords which can become corrupted.