Bad Nav - Can't I simply disconnect the Nav system?
I have a 2001 740IL and am experiencing the same problem: black screen with white lines.
I disconnected and reconnected the Nav system system last night. The problem went away for now. However, based on what I have read here, it is likely to return.
My question what happens if I disconnect the Nav permanently. Does the screen work normally for all other functions? Or will it only function if the Nav is connected?