Intel® 5000 Series Chipsets Server Board Family Datasheet System Management
Revision 1.1
Intel order number D38960-004
105
4.5 Integrated Front Panel User Interface
The BMC incorporates the front panel interface functionality and supports an SSI EB compliant
model. Indicators on supported front panels are LEDs.
4.5.1 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 35. Power LED Indicator States
State ACPI Power LED
Power off No Off
Power on No Solid on
S4 / S5 Yes Off
S1 Sleep Yes Blink
S3 Sleep Yes Blink
S0 Yes Solid on
4.5.2 System Status LED
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 platform hardware state and over-rides
the green status.
When the server is powered down (transitions to the DC-off state or S5), the BMC is still on
standby power and retains the sensor and front panel status LED state established prior to the
power-down event.
When AC power is first applied to the system and 5 volt standby power is present, the BMC
controller on the server board requires 15-20 seconds to initialize. During this time, the system
status LED will blink, alternating between amber and green, and the power button functionality
of the control panel is disabled, preventing the server from powering up. Once BMC initialization
has completed, the status LED will stop blinking and the power button functionality is restored
and can be used to turn on the server.
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).
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