Thank you...my mistake.
we are currently using using Armstone A9 for our company production and i saw connections of new board are same.
I received new Armstone MX8M, when connected to power, all leds are turned off and no output from serial port.
At least i expected some led turned on and some nboot/uboot activity on serial but card looks dead.
What i have to do? Do i contact Rutronik or you?