Hey guys thanks that you try to help me!
I owe you some more details:
In the moment the miner is working since 22 hours together with my other miners. I have full access to him over the webinterface. Better to say: He is working 100% like any other miner, I have yesterday even changed the firmware to the latest from 9.1.2015.
If the miner is up one time, he is running well!
But the problem appears when Im turning off while unplug/turn off the PSU
Without the contact (say stand-alone) to my PC or Netbook (that must be powered from the wall !!! too) he is not be able to start again.
So to me as a non expert it looks like there is not enough Power-Ground. But this little connection from the serial ports with a other device powered by circuit is the little bit that is needed to start.
Once it started and the network led on the miner becomes green I can remove the serial connection and keepit running.

With less words: If the miner is running I can do all the things I want, even reboot, flashing new firmware,make changes in pooll settings...all works like it should be.
But to make the miner start up he needs the "starting help" otherwise there is only the red LED of death 
Any suggestions?

I still have my S3 running strong.

"ok so are you running the Ethernet cable as well? do lights light up on ethernet cable?"(ignore this if not) or just usb tx/rx and gound? Your saying the serial gives it the proper conditions to run? What is the other device powered by circuit? How do you have this all connected can you provide pics? Bazaar and intriguing

Yeah looks like this miner is unique  
Tomorrow evening Im going to remove all screws inside and hopefully I can see something whats maybe wrong with him. Until there Im sure he will do a pretty good job for me  

I would agree on dns changing. 

The weird thing is I think hes using a serial to usb on the controller to get it to work.    Real-Duke do you have the usb to serial plugged in for it to turn on?

@Real-Duke,

You may want to go to System's Tab and uncheck Time Server NTP.  this could be the cause if you see NTP related error log entries in System Log near the start up time, if you are having problem connecting or to hash.

If the network has problem connecting to the NTP server, it may hang there for a while.

Just a thought

This is a extremely weird issue for it to work just by plugging it in.  Normally you would have to upload firmware via usb to serial for it to fix it.  Just plugging in should not fix the problem, but it did for you.  Sounds like there is something wrong with controller board, but glad you found a work around.   

You might check connection to board and make sure it's sitting on all of the pins and nicely snug.   

...but the controller board is still ok (like mentioned in my post before)
No need to replace this

Yea when he said serial connecting it confused me even more but he just meant usb jig. From the pics it looks like he is bypassing tx/rx but not ground. That should only have to do with networking correct me if I'm wrong. I dont see how that would have anything to do with powering on the miner. Maybe try replacing the connectors from the hash board to the control board and see if their is a problem there just to rule that out since this is unlikely to be the case. You could flash firmware have you tried flashing and starting it like normal?