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Intel® Server System M50FCP1UR System Integration and Service Guide
Appendix C. System Status LED Operating States and Definition
The server board includes a bi-color System Status LED. The system status LED on the server board is tied
directly to the system status LED on the front panel (if present). This LED indicates the current health of the
server system. Possible LED states include solid green, blinking green, solid amber, and blinking amber.
When the server system 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 before the power-down event.
When AC power is first applied to the system, the status LED turns solid amber, and then immediately
changes to blinking green to indicate that the BMC is booting. If the BMC boot process completes with no
errors, the status LED changes to solid green.
LED State
System State
No AC Power to system
Off
System is operating
Solid green
normally.
System is operating in a
degraded state
although still
functioning, or system is
Blinking
operating in a
green
redundant state but
with an impending
failure warning.
Blinking
System is initializing
green and
after source power is
amber
applied
alternatively
Table 7. System Status LED State Definitions
• System power is not present.
• System is in EuP Lot6 off mode.
• System is in S5 soft-off state.
• System is running (in S0 State) and its status is healthy. The system is not
exhibiting any errors. Source power is present, BMC has booted, and
manageability functionality is operational.
• After a BMC reset, and with the chassis ID solid on, the BMC is booting Linux*.
Control has been passed from BMC uBoot to BMC Linux*. It is in this state for
roughly 10–20 seconds.
• Redundancy loss such as power-supply or fan. Applies only if the associated
platform subsystem has redundancy capabilities.
• Fan warning or failure when the number of fully operational fans is less than the
minimum number needed to cool the system.
• Non-critical threshold crossed temperature (including HSBP temp), voltage, input
power to power supply, output current for main power rail from power supply and
Processor Thermal Control (Therm Ctrl) sensors.
• Power supply predictive failure occurred while redundant power supply
configuration was present.
• Unable to use all installed memory (more than 1 DIMM installed).
• Correctable Errors over a threshold and migrating to a spare DIMM (memory
sparing). This situation indicates that the system no longer has spared DIMMs (a
redundancy lost condition). Corresponding DIMM LED lit.
• In mirrored configuration, when memory mirroring takes place and system loses
memory redundancy.
• Battery failure.
• BMC executing in uBoot. (Indicated by Chassis ID blinking at 3 Hz while Status
blinking at 1 Hz). System in degraded state (no manageability). BMC uBoot is
running but has not transferred control to BMC Linux*. Server is in this state 6–8
seconds after BMC reset while it pulls the Linux* image into flash.
• BMC Watchdog has reset the BMC.
• Power Unit sensor offset for configuration error is asserted.
• SSD Hot Swap Controller is off-line or degraded.
• PFR in the process of updating/authenticating/recovering when source power is
connected, system firmware being updated.
• System not ready to take power button event/signal.
BIOS Status Description
97
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