Technical Product Specification

Table Of Contents
Intel
®
Server Board S5400SF TPS Server Management
Revision 2.02
Intel order number: D92944-007
53
4.4.1 Power LED
The green power LED is active when system DC power is on. The power LED is controlled by
the BIOS. The power LED reflects a combination of the state of system (DC) power and the
system ACPI state. The following table shows the states that can be assumed.
Table 19. Power LED Indicator States
State ACPI Power LED
Power off No Off
Power on No Solid on
S4/S5 Yes Off
S1 Sleep Yes ~1 Hz blink
S0 Yes Solid on
4.4.2 System Status LED
Note: The system status LED state shows the state for the current, most severe fault. For
example, if there was a critical fault due to one source and a non-critical fault due to another
source, the system status LED state would be solid on (the state for the critical fault).
The system status LED is a bicolor LED. Green (status) is used to show a normal operation
state or a degraded operation. Amber (fault) shows the system hardware state and overrides
the green status.
The Integrated BMC-detected state and the state from other controllers, such as the SAS/SATA
hot-swap controller state, is included in the LED state. For fault states that are monitored by the
Integrated BMC sensors, the contribution to the LED state follows the associated sensor state,
with the priority going to the most critical state that is currently asserted.
When the server is powered down (transitions to the DC-off state or S5), the Integrated BMC is
still on standby power and retains the sensor and front panel status LED state established prior
to the power-down event.