I’m trying to use my own power supply with the official TX1 carrier board. I was able to acquire the correct connector (the connection and polarity was verified with a multimeter), and I connected a lab power supply with the capability to supply up to 10A to it.
However, the board doesn’t start up with this power supply, the two green LEDs don’t light up when I press the power button. I tried an input range of 12-19V to no avail. I also tried another power supply that delivers 13.8V at 5A max.
The current limiting LED of the lab supply does flash up briefly, though. When I attach an oscilloscope to the 5V IO rail, I saw that it rises briefly and then bounces back to 0V.
Does anybody have any idea what’s going on? It looks like the inrush current is too high for the my power supplies, but the TX1 shouldn’t have that high of an inrush current I believe.
The board itself still works, I reconnected it to the power supply that came with it and it booted up fine.