Light Path Diagnostics Panel - IBM System x3550 M3 Type 4254 Installation And User Manual

v Ethernet activity LEDs: When any of these LEDs is lit, they indicate that the
v System-locator button/LED: Use this blue LED to visually locate the server
v System-information LED: When this amber LED is lit, it indicates that a
v System-error LED: When this amber LED is lit, it indicates that a system error
v Hard drive activity LED: When this green LED is lit, it indicates that one of the

Light path diagnostics panel

The light path diagnostics panel is located on the top of the operator information
panel.
Note: The system service label on the underside of the cover also provides
information about the location of the light path diagnostics LEDs.
To access the light path diagnostics panel, slide the blue release latch on the
operator panel to the left. Pull forward on the panel until the hinge of the operator
panel is free of the server chassis. Then pull down on the panel, so that you can
view the light path diagnostics panel information.
Note: When you slide the light path diagnostics panel out of the server to check
the LEDs or checkpoint codes, do not run the server continuously with light path
diagnostics panel outside of the server. The panel should only be outside of the
server a short time. The light path diagnostics panel must remain in the server
when the server is running to ensure proper cooling.
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IBM System x3550 M3 Type 4254 and 7944: Installation and User's Guide
Lit: The server is turned on.
Fading on and off: The server is in a reduced-power state. To wake the
server, press the power-control button or use the IMM web interface. See
"Logging on to the Web interface" on page 125 for information on logging on
to the IMM web interface.
server is transmitting to or receiving signals from the Ethernet LAN that is
connected to the Ethernet port that corresponds to that LED.
among other servers. This LED is also used as a presence detection button. You
can use IBM Systems Director to light this LED remotely. This LED is controlled
by the IMM. When you press the System-locator button, the LED will blink and
it will continue to blink until you press it again to turn it off. The locator button
is pressed to visually locate the server among the others servers.
noncritical event has occurred. Check the error log for additional information.
has occurred. A system-error LED is also on the rear of the server. An LED on
the light path diagnostics panel on the operator information panel is also lit to
help isolate the error. This LED is controlled by the IMM.
hard disk drives is in use.
Notes:
1. For a SAS drive, a hard disk drive activity LED is shown in two places: on
the hard disk drive and on the operator information panel.
2. For a SATA drive, hard disk drive activity is indicated only by the hard disk
drive activity LED on the operator information panel.