Hi dcfish,
I saw that you helped a lot of people out with the common navigation screen non-responsive issue. I have an IS300 2007 Middle East version and am having the exact same issue. The side buttons work and the rear view camera works when in reverse but I am unable to press anything on the screen. Appreciate if you could provide me with more details as to what you can do for me. My email is saadalrahman@qatar.net.qa
Appreciate the help.