But TFT burn in really isn't a thing... why would it be a concern? A power supply readout would, in a lot of ways, be an ideal candidate to demonstrate burn in.... but I don't think normal LCD technology is very susceptible to it at all. If it were a plasma screen or a CRT, sure, but an LCD is going to take what, thousands of hours to get any burn in? And even then the burned in parts will be the static parts of the UI which will be harder to notice because they'll still be displayed there.
Though it's a different technology LCD screen, my RF generator has been on for 33,600 hours (almost entirely before I got it) and shows no signs of burn in, even though there is really only one menu shape that is displayed at all times. My previous RF generator was the same way - tens of thousands of hours on and no burn in you could see when on or off.