what do I do worng?

[MarkHaysHarris777]

For the moment, I would forego connecting the power to the euler buss, since its working and power does not appear to be an issue;  but, the way is you cut the cable and put female jumpers on the wire ends (requires crimping and solder) and then you plug the +5v line on pin(4) or pin(2),  and plug the ground line (neg) to pin(6).

Your next step is going to find a monitor that supports 720p60 hdmi or 1080p60 hdmi  ;  

or, your next step is to connect a serial ttl to usb bridge cable to the pine board and plug the usb end into your pc, or mac;  you can watch the bootup log there, and when its up you'll be able to logon there too !  From there you may be able to fix some hdmi or networking parms.

Good to know the board works !