When no mouse moves, no animation or video I get this. https://photos.app.goo.gl/7QsssEY51cdNsJjs2 At the beginning it used to happen when the surface was hotter than usual, lately it happens daily. Yesterday at one point, it sustained, even with all the mouse moves and the video running. I turned off everything, removed electricity, changed to portrait, removed magnets, uninstalled a lot of apps… it keeps the jitters. The warranty is, of course, expired.