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An update; Went in to settings on laptop, selected devices>add a device, selected add a wireless device at same time as selected "Mirror Screen" on TV. After a few minutes the TV name appeared on the laptop, so I clicked on that and in a few more minutes the image on the laptop appeared on the TV. I watched the film and assumed the settings on the TV and laptop would be saved. However having come out of this mode and then gone back in to it, selecting mirror screen achieved nothing and so the process was repeated on the laptop and again this achieved a result - but it does not save the settings. Am I doing something wrong? I have not yet tried using my phone to "mirror" the screen display - not quite sure how but I'm going to go into the phone settings shortly to have a go. It's a Motorola G5S.