@David-TP I've not tried the guest network as I'd like users on the main LAN to be able to cast YouTube to the TV, hence do not want to be on a separate network. I have found a work-around by setting...

Samsung TV won't connect using Wifi password. Will connect if I use WPS, but then disconnects after a few minutes. I've run a Wifi analyser and notice that a "hidden network" associated with the DECO...