Advantech AIMB-742 - Cpu;System Fan Power Conn (CN14;15;37); Power LED (CN16); Table B.10: Power LED and Keylock Conn (CN16)

AIMB-742 User’s Manual 94
B.9 CPU/System Fan Power Conn (CN14/15/37)
B.10 Power LED (CN16)
You can use an LED to indicate when the motherboard is on. Pin 1 of
CN16 supplies the LED's power, and Pin 3 is the ground.
Table B.9: CPU/System Fan Power Conn (CN14/15/37)
Pin Signal
1 GND
2 +12V
3 Detect
Table B.10: Power LED and keylock conn (CN16)
Pin Function
1 LED power (+5 V)
2NC
3GND
4NC
5GND