Had a dead pixel from the instant I first turned on my SurfaceRT. But it went away after some quick sliding around of various screens about 10 minutes into my 1st session. Then, it came back, same spot, in lower right area. Took less time for it to start working again, and has not returned. Circuit board connections may need something like a burst of current to break the possible resistance in a slightly imperfect and extremely tiny solder joint. Before trying MS service, I suggest high screen brightness and quick screen changes.