rpi don’t start on the same time

I have problem with my rpi. Vcore 3.1, Skrat 1.0, ebb42, On video you can see that skrat and rpi have power on the same time and rpi have just red light. Green don’t turn on. I must take off usb cabel and then rpi starts. Where is problem? I have tried powred rpi from motherboard and now from dc-dc and allways is the same problem