Actual FREEPBX install on PCENGINES APU2c Board


I try To install the actual FREEPBX Distro on an APU2C Board via a serial Null Modem Cable. I have saved the ISO to an USB Stick and when I try to install and after I select the USB Stick to boot the screen will be stay blank and Nothing happens anymore.

Is there somebody around who can help me to solve this problem or is it possible anyway ?