IBM x3950 Problem Determination And Service Manual page 21

is lit, information is available in the baseboard management controller (BMC) log
or in the system-event log about the condition. The condition might be that the
BMC log is full or almost full.
This LED and LEDs on the light path diagnostics panel remain lit until you
resolve the condition. If the only condition is that the BMC log is full or almost
full, clear the BMC log or the system-event log through the Configuration/Setup
Utility program to turn off the lit LEDs. See "Using the Configuration/Setup Utility
program" on page 152 for information about clearing the logs. Clear the logs after
you have resolved all conditions.
v Release latch: Slide this latch to the left to access the light path diagnostics
panel.
v System-error LED: When this LED is lit, it indicates that a system error has
occurred. An LED on the light path diagnostics panel is also lit to help isolate the
error.
v Locator LED: When this LED is lit, it has been lit remotely by the system
administrator to aid in visually locating the server.
In multi-node configurations, when this LED flashes during startup, it indicates
that the server is the primary node. When this LED is lit during startup, it
indicates that the server is a secondary node.
v Hard disk drive activity LED: When this LED is flashing, it indicates that a SAS
hard disk drive is in use.
v Power-on LED: When this LED is lit and not flashing, it indicates that the server
is turned on. When this LED is flashing, it indicates that the server is turned off
and still connected to an ac power source. When this LED is off, it indicates that
ac power is not present, or the power supply or the LED itself has failed.
Note: If this LED is off, it does not mean that there is no electrical power in the
server. The LED might be burned out. To remove all electrical power from the
server, you must disconnect the power cords from the electrical outlets.
Electrostatic-discharge connector: Connect an electrostatic-discharge wrist strap
to this connector.
DVD drive activity LED: (Standard on some models only) When this LED is lit, it
indicates that the DVD drive is in use.
DVD-eject button: (Standard on some models only) Press this button to release a
CD or DVD from the DVD drive.
5
Chapter 1. Introduction