Technical product specification

Table Of Contents
Technical Reference
45
2.2.3.4.3 Power/Sleep LED Header
Pins 2 and 4 can be connected to a one- or two-color LED. Table 19 shows the possible LED
states.
Table 19. States for a Dual-Color Power LED
LED State
Description
Off Power off
Blinking Standby
Steady Normal operation
Table 20. States for a Dual-Color Power LED
LED State Description
Off Power off
Secondary color blinking
(amber)
Standby
Primary color steady (white) Normal operation
NOTE
The LED behavior shown in Table 19 is default other patterns may be set via BIOS setup.
2.2.3.4.4 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.