Diagnosing Problems Using Light Path Diagnostics; Light Path Diagnostics Leds - IBM System x3650 Installation Manual

Press the reset 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 server is designed so that LEDs remain lit when the server is connected to a
power source but is not turned on, provided that the power supply is operating
correctly. This feature helps you to isolate the problem when the operating system
is shut down.

Diagnosing problems using light path diagnostics

LEDs in two locations on the server are available to help you diagnose problems
that might occur during installation. Use them in the following order:
1. Light path diagnostics panel - Look at this panel first. If a system error has
2. LEDs on the system board - To identify the component that is causing the

Light path diagnostics LEDs

The following table describes the LEDs on the light path diagnostics panel, the
problems that they indicate, and actions to solve the problems.
v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See the parts listing in the Problem Determination and Service Guide to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
LED Description
None, but An error has occurred and cannot be
the diagnosed, or the Advanced System
system- Management (ASM) processor on the
error LED Remote Supervisor Adapter II SlimLine
is lit. has failed. The error is not represented
by a light path diagnostics LED.
OVER The power supplies are using more
SPEC power than their maximum rating.
PS 1 The power supply in bay 1 has failed.
occurred, the system-error LED on the front of the light path diagnostics drawer
is lit. Slide the latch to the left on the front of the operator information panel to
access the light path diagnostics panel. Note any LEDs that are lit, and then
close the drawer.
error, note the lit LED on or beside the component.
Action
Use the Configuration/Setup Utility program to check the
system-error log for information about the error.
1. Remove optional devices from the server.
2. Replace the failing power supply.
Attention:
personnel other than IBM service technicians are authorized to
connect or disconnect power to the dc power supply and to
remove and install a dc power supply. See the documentation
that comes with each dc power supply.
1. Make sure that the power supply is correctly seated.
2.
Attention: In a dc power environment, only trained
service personnel other than IBM service technicians are
authorized to connect or disconnect power to the dc power
supply and to remove and install a dc power supply. See
the documentation that comes with each dc power supply.
In a dc power environment, only trained service
Replace the failed power supply.
Chapter 5. Solving problems
75