Hello! I have recieved my UDOO x86 Ultra a few days ago and I can't get it to work no matter what. I connected a USB keyboard, HDMI and then power. The status LED lights up green almost immediately, but I my screen stays blank. I've tested all video outputs (HDMI, mDP1, mDP2) on two different monitors but there is never any picture. I would expect to see UEFI/BIOS, but the monitors just go to sleep right away every time. I have tried turning off/on again, resetting, pressing ctrl-alt-del but I just can't get a picture. What else can I try?