GL-B1300: leds don't turn on

Hello, the LEDs on my router stopped working few updates ago.
Today I upgraded to 4.3.10 (release2) without keeping the configuration, but nothing changed.

I connected to it via ssh and tried different commands, but nothing worked, the LEDs never turn on:

source /lib/functions/gl_util.sh
turnoff_led
turnon_led
echo none > /sys/class/leds/green:power/trigger
echo 0 > /sys/class/leds/green:power/brightness
echo none > /sys/class/leds/green:power/trigger
echo 255 > /sys/class/leds/green:power/brightness

This is the output of ls -la /sys/class/leds/

drwxr-xr-x    2 root     root             0 Jan  1  1970 ./
drwxr-xr-x   37 root     root             0 Jan  1  1970 ../
lrwxrwxrwx    1 root     root             0 Jan  1  1970 green:mesh -> ../../devices/platform/leds/leds/green:mesh/
lrwxrwxrwx    1 root     root             0 Jan  1  1970 green:power -> ../../devices/platform/leds/leds/green:power/
lrwxrwxrwx    1 root     root             0 Jan  1  1970 green:wlan -> ../../devices/platform/leds/leds/green:wlan/

I am running out of ideas, can you help me?