LED There are 2 LEDs on the AIO-1684XQ board: Example command to control LED light state (requires root privileges): # yellow light on echo 1 >/sys/class/leds/DIY_LED/brightness # yellow light off echo 0 >/sys/class/leds/DIY_LED/brightness # green light on echo 1 >/sys/class/leds/WORK_LED/brightness # green light off echo 0 >/sys/class/leds/WORK_LED/brightness