Technical Product Specification

Intel® Server Chassis SC5600 Front Panel

Revision 1.1

Intel order number E39532-004

3.3.1 Power / Sleep 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. Table 8 shows the states that can be assumed.

Table 8. Power LED Operation.

State Power Mode LED Description

Power off Non-ACPI Off System power is off, and the BIOS has not initialized the chipset.

Power on Non-ACPI On

System power is on, but the BIOS has not yet initialized the

chipset.

S5 ACPI Off Mechanical is off, and the operating system has not saved any

context to the hard disk.

S4 ACPI Off Mechanical is off. The operating system has saved context to the

hard disk.

S3-S1 ACPI Slow blink DC power is still on. The operating system has saved context and

entered into a level of low-power state.

S0 ACPI Steady on System and the operating system are up and running.

3.3.2 System Status LED

The system status LED is a bi-color LED. Green (status) shows a normal operation state or a

degraded operation. Amber (fault) shows the platform hardware state and overrides 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. If the system status is normal when the system is powered down (the LED is

in a solid green state), the system status LED will be off.

3.3.2.1 Critical Conditions

A critical condition is defined as any critical or non-recoverable threshold crossing associated

with the following events:

 CPU Missing

 Thermal Trip asserted

 Non-recoverable temperature threshold asserted

 Non-recoverable voltage threshold asserted

 Power fault / Power Control Failure

 Fan redundancy lost, insufficient system cooling. This does not apply to non-redundant

systems.

 Power supply redundancy lost insufficient system power. This does not apply to non-

redundant systems.