hi all i have a black / blank screen, but with power behind radio works fine i have removed cleaned and replaced all connectors including the head unit but to no avail could any one advise whether they suspect this will be a screen replacement or a navigation computer replacement ? dont...

does anyone have any thoughts? thanks

Have had a few weeks of the radio cutting in and out Now the screen has gone blank permanently, though has powered behind it have removed the navigation unit and refitted it in case was a loose wiring have removed fuse 49 for 10 minutes and refitted it have removed the connectors to the amp and...