Intel
®
Server Board S5500BC TPS
Intel® Light-Guided Diagnostics
Revision 1.0
Intel order number: E42249-003
65
7. Intel
®
Light-Guided Diagnostics
The Intel
®
Server Board S5500BC has several on-board diagnostic LEDs to assist in
troubleshooting board-level issues. Functionality of the on-board LEDs is owned by the BMC
and system BIOS. This section provides an overview of each LED including the location and a
high level-usage description.
7.1 5-Volt Standby LED
Several server management features on the Intel
®
Server Board S5500BC require a 5-volt
stand-by from the power supply. The features and components that require this voltage be
present when the system is “Off” include the Integrated BMC, onboard NICs, and optional Intel
®
Remote Management Module 3 connector with Intel
®
RMM3 installed. (Refer to Figure 10: Intel
®
Server Board S5500BC Layout for the location.)
7.2 System ID and Status LED
The Intel
®
Server Board S5500BC provides a System ID LED and a Status LED. Refer to Figure
10 for the location. The blue system identification LED helps identify a system for servicing. This
is especially useful when the system is installed in a high-density rack or cabinet populated with
several similar systems. The blue “System ID” LED can be illuminated using either of two
mechanisms.
By pressing the system ID button on the system control panel, the ID LED displays a
solid blue color until the button is pressed again.
By issuing the appropriate hex IPMI “Chassis Identify” value, the ID LED either blinks
blue for 15 seconds and turns off or blinks indefinitely until the appropriate hex IPMI
Chassis Identify value is issued to turn it off.
Note: The system status LED 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 would be solid, which is the state for a critical fault.
The system status / fault LED is a bi-color LED. Green (status) indicates normal (solid-on) or
degraded (blink) operation. Amber (fault) indicates a failure state and overrides the green
status. The system status LED is controlled by the BMC, but includes non-BMC owned sensors
in a fault determination such as BIOS-owned sensors.
When the Intel
®
Server Board S5500BC 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. If the system status is OK (LED in solid green state),
then the system status LED is off when the system is powered down.
The LED state information in the following table is dependent on the underlying sensor support.
