My assumption is that it is glue within the screen causing the yellow border - that would be the manufacturer. You're saying that Tesla glued components together & didn't purchase an assembled MCU?Specs for the screens, that are not having an issue, are irrelevant. The issue is the glue that is turning yellow. Now if you can get Tesla to tell what glue was used, some relevant information might be gained. It would also be informative to know who applied the glue to the 2 components, and if it was not the manufacturer of the LCD or the screen, why wasn't it.