I am having trouble turning the (optionally) passenger display back on. I think I am following the manual instructions: 'Hold down the DISP button to turn passenger display on and off'. However, holding the button does not seem to turn the screen back on. I previously had this problem, got my Ferrari tech on the phone, and voila it worked, except i don't know what i did. I think it had to do with the display/head light switch... Obviously, i am "display button" challenged. Any input would be greatly appreciated. Thanks.