First post here! I hope to be part of this community, I think I'll need it because there are lots of things to solve. Let's si if once every piece of docs is released the board improves.
Type this:
cat /sys/class/leds/onion:amber:system/trigger
You'll get an output with something among [].That is the mode of your LED, it should be default-on but it will probably be timer. Write this:
echo default-on > /sys/class/leds/onion:amber:system/trigger
Cheers,
Iker.