Hi all. I am trying to power the Jetson Nano through the GPIO (J41) on pins 2,4 (5V) and 9,14 (GND). For some reason, the board powers on long enough to show the NVIDIA logo then shuts down completely. Here’s what I’ve tried so far:
Using an anker power bank I’ve powered the Jetson Nano successfully through the uUSB port (also proving that the supply is capable of powering the board). I have tried powering the Jetson from the same anker supply through the GPIO but still the board shuts down after the NVIDIA logo.
Powering the Jetson Nano through the GPIO using a bench power supply. Just like before, I see the logo screen followed by a power down.
I took a few measurements with a multimeter and noticed that when I initially power the board through the GPIO, the 3V3 LDO seems to be doing its job properly. Once the board shuts down even the 3V3 rail on GPIO goes out as well, however, 5V is still present on pins 2,4 on the GPIO.
Is there something fundamentally different between powering the Jetson through the GPIO vs the barrel jack or uUSB? The only difference I see is that we completely bypass the selection circuit on page 11 of the schematic. Is there a signal I’m missing that gets triggered when you go through the uUSB or barrel jack that allows all of the regulators and Jetson to stay on?