Octopus 1.1 - connection problem

Hello. I have a problem with Octopus 1.1. The board is new. I am unable to connect it to either an RPi or a computer (Windows doesn't detect it in any way). After powering it on, 3 LEDs light up. Uploading firmware works (it changes from BIN to CUR). I also tried connecting it via UART.
Is there anything else I can try to do, or is it likely to have a factory defect?