Front Panel LEDs
Part number 3501615,3501680,3501729,3501855

Other than the System ID LED and the drive LEDs, the LEDs are clustered around the power button.

Front Panel LED Functions
LetterLEDColorStateDescription
ANIC 2GreenONLink
GreenBlinkingNetwork activity
BNIC 1GreenONLink
GreenBlinkingNetwork activity
CPower/Sleep1GreenONLegacy power on / ACI S0 state
BlinkingSleep / ACPI S1 State
OffOFFPower off / ACPI S4 or S5 state
DFixed disk activityGreenRandom blinkingHard drive activity; this is an ’OR’ of the activity for the on-board SCSI or IDE controllers
AmberOnHard drive fault; cleared when powered off
OffOffNo indentification
ESystem status on standby power
(Fault LED)		GreenOnRunning BIOS initialization complete, boot started / normal operation
BlinkingDegraded condition
AmberONCritical or non-recoverable condition
BlinkingNon-critical condition
OffOffPost / Stystem stop
FSystem ID LEDBlueONIdentify active via button (The button has precedence over the command.)
BlueBlinkIdentify active via command
OffOFFNo identification

Note: The BIOS controls the function of the Power/Sleep button.

SSI Power LED operation
StatePower ModeLEDDescription
Power OffNon-ACPIOFFServer power is off, and the BIOS has not initialized the chipset.
Power onNon-ACPIONServer power is on, but the BIOS has not yet initialized the chipset.
S5ACPIOFFMechanical off, and the operating system has not saved any context to the hard drive.
S4ACPIOFFMechanical off, and the operating system has saved context to the hard drive.
S3-S1ACPISlow blinking 1DC Power is still on. The operating system has saved context and gone into some level of low-power state.
S0ACPISteady onThe server and the operating system are up and running.

Note: Blinking rate is approximately 1 Hertz (Hz) with a 50 percent duty cycle.