How to get PSU running with BeageBoard Black?

Hello all,

I am new to Beaglebone. Trying to get a Bitcoin mining rig working with a Beaglebone Black based controller.

BeagleBone is connected to USB hub and on to miners using usb port. Miners are connected to a PSU and currently I do not know how to get PSU to start up and power up miners, unless that PSU is connected to another running computer. Essentially I need to get a free standing PSU to start up and power miners when BeagleBone starts.

Can some one help me with this newbie issue?

Short green & black...

picture here: