We got 12 Jetson nano production modules and flashed them with JetPack 5.1. We designed a custom carrier with PoE for our product, however out of the 12 modules when they are on our custom carriers:
7 are working properly.
3 work as expected when they are first connected, but once they heat-up (at about 39°C) and then are rebooted or shutdown (or sometimes crashed after an hour), they will not boot again until the modules (not the custom carriers) are cooled down.
2 will never boot.
And these 12 modules will always work properly when connected to a carrier from the Jetson nano developer kit.
The custom carriers do not have an HDMI or a serial port. We flash the production modules on a developer kit carrier board. And in order to determine whether the modules are working properly in our custom carriers, we connect via remote ssh.
We have also verified the following:
The behavior of each module is consistent when connected on different units of our custom carrier.
Other Jetpack versions get the same results.
There were no issues using any of the 4 Jetson nano developer modules we had available with our custom carriers.
We have reviewed the sample schematics provided by nvidia (PCB-Rev P3449-B01) and compared them to our own but we cannot find any difference that would account for these irregularities. Could you provide any leads on how to identify the issue? Thanks a lot.