generall network interface issues

[Sandman01]

Have you hooked up a serial console to pins 7-9 (9 GND) of the EXP connector and logged the boot yet?
Have you tried ethernet yet?

Thanks for the advice.
I will try to log the pins under rasbian-jessy with my RaspberryPi and look what will be dumped

What do you mean by "Have you tried ethernet yet?"
The cable and the network is running well when I plug in any of my other network devices (TV's RaspberryPi's,...)
all of them can use the network after a few seconds (after plug in that network cable)

thx
Mario