got_root?

This is in a 2002 Porsche C4s

Here's what I've done so far (in addition to hooking up the speaker wires):

from the diagrams I've linked below...

Kenwood wire A goes to Becker wire Socket A #7
Kenwood wire B goes to Becker wire Socket A #4
Kenwood wire C goes to Becker wire Socket A #8

When I plug it in, I get no display at all. I do have power because the upside down triangle light is blinking and hitting eject causes the screen to flip up. When I push the system reset button or flip the screen up, I can notice the back light change somewhat, but still no display.

What could cause there to be no display at all? Have I missed a step?

Kenwood wiring diagram - http://www.jother.com/kenwood/kenwood.jpg

Stock Becker radio diagram - http://www.jother.com/kenwood/becker.jpg


Thanks in advance for any help... josh