IBM x3550 - System - 7978, Problem Determination And Service Manual

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Light path diagnostics panel
The light path diagnostics panel is on the top of the operator information panel.
To access the light path diagnostics panel, push the release button on the operator
panel to the left. Pull forward on the unit until the hinge of the operator panel is free
of the server chassis; then, pull down on the unit, so that the operator information
panel is at a right angle with the server.
Release button
Operator information
panel
Light path LEDs
The following illustration shows the LEDs and controls on the light path diagnostics
panel.
DASD
NMI
PCI
PS1
SP
PS2
CNFG
MEM
CPU
FAN
VRM
OVER SPEC
TEMP
REMIND
S ERR
Light Path
Diagnostics
RAID
BRD
v
Remind button: This button places the system-error LED on the front panel into
Remind mode. In Remind mode, the system-error LED flashes rapidly until the
problem is corrected, the system is restarted, or a new problem occurs.
By placing the system-error LED indicator in Remind mode, you acknowledge
that you are aware of the last failure but will not take immediate action to correct
the problem. The remind function is handled by the BMC.
v Reset button: Press this button to reset the server and run the power-on
self-test (POST). You might have to use a pen or the end of a straightened paper
clip to press the button. The reset button is to the right of the remind button.
For information about light path diagnostics, see the System x3550 Problem
Determination and Service Guide on the IBM System x Documentation CD.
Chapter 1. Introduction
7