Rabux

for the LEDs you can try the following:

ls -l /sys/class/leds
(here as example from a NanoPi Neo2):
lrwxrwxrwx 1 root root 0 Feb 20 21:50 nanopi:green:status -> ../../devices/platform/leds/leds/nanopi:green:status
lrwxrwxrwx 1 root root 0 Feb 20 21:50 nanopi:red:pwr -> ../../devices/platform/leds/leds/nanopi:red:pwr
 
then echo none to the trigger of the led-name: 
 
echo 'none' > /sys/class/leds/[name_of_the_led]/trigger
 
so it should look like this:
 
echo 'none' > /sys/class/leds/nanopi:green:status/trigger
 
You only have to check the led-names of your board and add the commands in /etc/rc.local before "exit 0"