As mentioned in the forum according the power supply, https://devtalk.nvidia.com/default/topic/1048640/jetson-nano/power-supply-considerations-for-jetson-nano-developer-kit/, I am testing an external 4G modem with the Nano.
The Jetson and the Modem are connected to the same lab power supply (5A max) in parallel.
When the power is on, both device start but the Jetson shutdown few seconds after the start sequence (Power led off).
I tried various sequence with and without voltage regulator (3A max to see it it was due to a lower voltage than 5Vcc), it is always the same !
Also starting first the Jetson and powering the modem once the Nano is on…the Jetson shutdown immediately.
Please, do you have some feedback about this critical point ?
Thank you for your help and support.