I've been trying to get my Quad to boot for days with no success. Got the PSU from udoo, so I know it's the right kind. Voltage is good according to a Vohm. I tried 2 diff cards, 4 OSes. Nothing. Shows up on the serial and stop at differing, but repeatable, steps per OS. Then I plugged another USB from my desktop into the 2nd udoo usb port and hit reset. It worked. I just logged in fo rthe first time! Very cool! But why? Does this suggest that the PSU is bad and that the 2nd usb is supplying the additional power required? Or is the board having issues breaking down the 12v from the PSU to other voltages? Anyone have any great ideas? Thanks in advance, and Happy Thanksgiving!