I replaced all the cables, according to the instructions on page 132.
Then I measured the crossing, all is ok.
What I noticed is, that at the Control side Pin4 is crossing MIC-GND and GND and Pin 6 GND and MIC-GND.
Is that ok?
When I press the power button, the display will not start anymore.
On the control side the red and yellow LED's are on, but on the radio side only the red is shortly on and then the unit restarts.