You got a DVD-based MKIV, correct? Where did you get the MKIV, and what are the details of the car that it came from?

There were two versions of the navigation system-- the U.S. (and I think all of North America) only got the professional system that has the full color, in-dash display. Europe got the option for a Business navigation system that had a simple text-only display on the face of a standard radio.

The MKIV is configurable to work with either system. If you got a MKIV that is coded for a radio nav, it will just give you the blank screen in your car.

If the dealer replaced the nav computer and the car came to life, then that is a pretty good indication that the original nav computer was bad and everything else is OK. So, you have two likely causes:

1) You received a bad nav computer
2) The nav computer is coded for the monochrome, radio nav configuration

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SOLD
2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input