Yep, everything runs of the 12VDC PC power supply, I use one of these to bring the power back to 5VDC to the tinker board:
https://www.ebay.com.au/itm/DC-Buck-...sAAOSwUoNaPIJX
Runs the tinker board perfectly through micro USB plug, or you could just connect to the GPIO header.
Yep i know what you mean, i hate cables as well.