hey i just finished building a kit of the preen fm2 R5c and all looked fine until i tested if it works (preenf405). i prepared a usb stick as described in fat 32 with the required folders and files. but when i try to bootload, the display jsut shows weird characters. i can navigate through some menus full of odd characters. when i start the preen normal, the leds start flashing on and off several times, but the display stays black.
someone has an idea what could be the problem?