User`s manual

25 Chapter 2

2.12.1 Power LED and Keyboard Lock (CN16)

CN16 is a 5-pin connector for the power on LED. Refer to Appendix B

for detailed information on the pin assignments. If a PS/2 or ATX power

supply is used, the system's power LED status will be as indicated below:

2.12.2 External speaker (CN17)

CN17 is a 4-pin connector for an external speaker. If there is no external

speaker, the AIMB-740-6CB1 provides an onboard buzzer as an alterna-

tive. To enable the buzzer, set pins 3-4 as closed

2.12.3 Reset (CN18)

Many computer cases offer the convenience of a reset button. Connect the

wire from the reset button

2.12.4 HDD LED (CN19)

You can connect an LED to connector CN19 to indicate when the HDD is

active.

Table 2.1: PS/2 or ATX power supply LED status

Power mode LED (PS/2 power) LED (ATX power)

System On ON ON

System Suspend Fast flashes Fast Flashes

System Off OFF Slow Flashes