Product Data Sheet / Brochure

Technical Reference
37
4.1.1.1.3 Power/Sleep LED Header
Pins 2 and 4 can be connected to a one- or two-color LED. Table 15 and Table 16 show the
possible LED states.
Table 15. States for a One-Color Power LED
LED State
Description
Off
Power off
Blinking
Standby
Steady
Normal operation
Table 16. States for a Dual-Color Power LED
LED State
Description
Off
Power off
Blinking (white)
Standby
Steady (white)
Normal operation
NOTE
The LED behavior shown in Table 15 is default – other patterns may be set via BIOS setup.
4.1.1.1.4 Power Switch Header
Pins 6 and 8 can be connected to a front panel momentary-contact power switch. The switch
must pull the SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or
off (the time requirement is due to internal debounce circuitry on the board). At least two seconds
must pass before the power supply will recognize another on/off signal.
4.1.1.2 BIOS Security Jumper
CAUTION
Do not move a jumper with the power on. Always turn off the power and unplug the power cord
from the computer before changing a jumper setting. Otherwise, the board could be damaged.
Figure 11 shows the location of the BIOS Security Jumper. The 3-pin jumper determines the BIOS
Security program’s mode.