SATNAV / ENTERTAINMENT SYSTEM ISSUE

[Mitchjo]

Hello, I have a 2007 D40 with the sat nav package. For some reason I cannot get any display on the entertainment System, it’s just a blank screen. I have changed the display screen and the actual cd player/radio. I have checked all the fuses and yet the screen still won’t display anything? Both of the CD players/radios make a noise when I install them so I know they have power and the screen changes colour slightly when ignition is turned on. I don’t know what else could be causing the blank screen? Any advise

 

[Old.Tony]

Is it getting a reverse signal and trying to switch the display to a camera input? Check pin 3 of the power-ISO plug, it should not have power to it unless you're in reverse.