03-14-2017, 12:22 AM
Well this sounds strange. The only thing that happens on the first boot is generating keys. This takes a lot of computing power. May be the power supply is not sufficient for this and when HDMI is connected extra power is available through HDMI.
If the board does not not, do you know what the error is? Where is it stuck? How did you find out that it did not boot?
If the board does not not, do you know what the error is? Where is it stuck? How did you find out that it did not boot?