Kenwood DDX4015BT has blue screen and shows "no navigation" everything else works. Any idea?

SOURCE: CD player and everything works fine but there is no display .....

Well, my display went out earlier this week. Took it apart and found out that the LCD on the 501dpx was burnt out. I also found out all we have to do is replace the whole faceplate instead of the system

SOURCE: RB4 problem

You have a problem on the NAV PCB.
Here at Hunt Automotive Electronics we are the only authorized repair center for the Harman RB4 chry Nav radio.I have run across many RB$ units with this problem.

SOURCE: 2005 KDC-MP5028 CD/MP3 ReceiverFree Standard Shipping: need to unlock a kenwood stereo that has the navig...

need unlock code bought used car battery died stero needs code dealer has no idea