Questions about Jetson power on

hi, i have a question about tk1 board power on.

case1:

  1. tk1 board power off normally(by terminal).
  2. disconnect power cable from tk1 power connector.
  3. power cable connect to tk1 power connector.
  4. tk1 board auto booting.

case2:

  1. tk1 board power off by disconnect power cable from tk1 power connector(when tk1 is running).
  2. power cable connect to tk1 power connector.
  3. tk1 board not auto booting. (must press power button)

I want to know about case2.
when power cable connect to tk1 power connector
how to auto boot(without press power button) just like case1?

Please check this thread:

https://devtalk.nvidia.com/default/topic/795221/embedded-systems/how-to-set-up-jetson-board-to-boot-automatically-when-power-applied-