Troubleshooting Tools; Leds; Front Panel; External Health Led (Ehled) - HP AB464-9003F Service Manual

Table 41 Advanced Entry Class Troubleshooting (continued)
Step Symptom/Condition
8b MCA occurs during server
operation; server reboot of OS
is prevented.
NOTE:
actions for this step are identical
to those in Step 8a, except that
the server in this step must be
hard reset to begin the booting
process)
NOTE:
the server to clear the fatal
condition and boot the OS.)

Troubleshooting Tools

LEDs

Front Panel

The front panel of the system contains the Power Button/System Power LED, Internal and External
Health LEDs, System Health LED, Locator Switch/LED, and an INIT button. This server uses
flashing states (for example, flashing amber or red) on these LEDs to indicate a warning or an
error.
There are a total of three buttons, arranged horizontally, with the UID button and the Power button
each having an integrated LED. In addition to the two integrated button/LEDs, there are three
health LEDs and an INIT button.
The health LEDs are arranged sequentially in line with the Power button/LED, and as the system
starts up, there will be more "green" the further the system proceeds in the startup process.
1. The power LED will turn green soon as the system starts to power up.
2. The external health indicator will turn green as soon as the BMC can light it.
3. The internal health indicator will turn green as soon as the BOOT_START event is received
from system firmware (BOOT_START can be determined by LED states on the I/O backplane
board).
4. The system health indicator will turn green when firmware leaves "exit boot services" and
we begin to boot an OS.
The health LEDs are driven by the BMC; the Power LED is driven solely by hardware. BMC code
determines the state of the Internal and External Health LEDs, while the iLO 2 MP code, examining
incoming events using its event dictionary, determines the state of the System Health LED.

External Health LED (EHLED)

The front panel Externally Serviceable Server Health LED, called the External Health LED,
indicates the status of the components that are externally serviceable. In most systems, this LED
is only used to monitor the power supply status and external fans. Whenever the external health
LED is lit, the corresponding FRU should be lit for the failed component.
Failures that cause the External Health LED to light will not cause the Internal Health LED to
light. These two LEDs cover failures of different components.
Table 42 displays information about the External Health LED states.
Action
Preceding problem is fixed when the MCA does not repeat, or the source
of the MCA has been determined and dealt with.
Front panel LEDs indicate that the server detected a fatal, front side bus
error, caused by MBEs reading cache or DIMM; or by any parity in the I/O
path between SBA, LBA, or HBA (for example, System Health is Off,
Internal Health is Flashing Amber, External Health is Steady Green, Power
The troubleshooting
is Steady Green). System firmware is running to gather and log all error
data for this MCA event.
1. Examine the iLO 2 MP logs for entries related to processors, processor
Preceding problem is fixed when the MCA does not repeat.
You must hard reset
power modules (PPMs), shared memory, and core I/O devices (see
"Errors and Reading Error Logs" (page 148)).
Troubleshooting Tools 141