Please try the command to turn on the led:

/etc/init.d/led enable
/etc/init.d/led restart

then, check to see if gl_mt1300_led_daemon is already running

root@GL-MT1300:/# ps | grep led
21981 root      1232 S    grep led
22841 root      1240 S    /bin/sh /usr/bin/gl_mt1300_led_daemon