lg 49" 4k smart tv (Feltham TW14)

Model 49UB850V has been used by my son as a PC gaming monitor from new. I think the back light is beginning to 'dim' and so we are replacing it. It doesn't come with a stand as it has always been wall-mounted, although we have packed it in the box vacated by the new TV. See pictures which show the screen working along with an active WiFi connection.