Navidrive ng4 3d go,s black

[Martinanker]

Have a citroen c5 x7 2,0 with Ng 4 navidrive 3d ,The screen has recently started swicthing off and on On som days it happens, on others not
When it is in black tre directions still works accordings to voice instructions . What could be wrong, could itbe a loose connetion or are we in
For something worse :

[GiveMeABreak]

Please don't create duplicate posts as it causes duplication of answers. I've deleted your other thread on the Citroen Forum, so please keep all replies here.

Hard to say whether this will be the hardware in the Head Unit, the Display Screen, or the LVDS cable between the two.