I had my late 2016 P100D FSD serviced for a humming noise from my right speaker in the trunk about a month ago. It had previously been upgraded to an MCU2 with a new screen. During the service visit they replaced the MCU2 screen with a refurbished unit. Since then I have noticed green lines going horizontally across the screen intermitently. Over the weekend the problem became worse during two drives and the image was much more scrambled near the bottom. I asked a technician who about what the issue could be. He asked if I have the rear view camera image on the screen at all times. I told him I do most of the time. He says it’s not meant to be displayed so much and to only have it in the screen when backing up or to briefly check on things. Why would they have the option of having it display all the time if it’s not built to do that? My fathers model x has exhibited no ill-symptoms from having it on 100% of the time. Is this really true or did they put in a faulty refurbished mcu2 or possibly a bad connection during the install? I am covered under CPO warranty as well as mcu warranty and x-care warranty as well.