With installation Jetbot SD card images of NVIDIA nano development kit, I confirmed the power LED light was ON and ubuntu was worked via micro-USB(J28) without Motor driver and PiOLED.
After connected wires to PiOLED from motor driver, the power light was off.
I knew the wrong connection the red and yellow(SCL) wires and corrected the connections.
But the nano system doesn’t turn on.
Can the system damage(power) by the first wrong connection?
Must I give up the nano development kit?
I checked the following url and couldn’t find a solution.
Please let me know any advices and how to contact custom support in japan.