IBM x3655 Service Guide - Page 156

Universal, Serial, problems, Video, Light, diagnostics

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Universal Serial Bus (USB) port 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 Chapter 4, "Parts listing, System x3655, Type 7985," on page 97 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. Symptom Action A USB device does not work. 1. Make sure that: v The correct USB device driver is installed. v The operating system supports USB devices. 2. Make sure that the USB configuration options are set correctly in the Configuration/Setup Utility program menu (see the User's Guide for more information). 3. If you are using a USB hub, disconnect the USB device from the hub and connect it directly to the server. 4. Move the device cable to a different USB connector. Video problems See "Monitor problems" on page 132. Light path diagnostics Light path diagnostics is a system of LEDs on various external and internal components of the server. When an error occurs, LEDs are lit throughout the server. By viewing the LEDs in a particular order, you can often identify the source of the error. When LEDs are lit to indicate an error, they remain lit when the server is turned off, provided that the server is still connected to power and the power supply is operating correctly. Before you work inside the server to view light path diagnostics LEDs, read the safety information that begins on page vii and "Handling static-sensitive devices" on page 37. If an error occurs, view the light path diagnostics LEDs in the following order: 1. Look at the operator information panel on the front of the server. v If the information LED is lit, it indicates that information about a suboptimal condition in the server is available in the BMC system event log or in the system event/error log. v If the system-error LED is lit, it indicates that an error has occurred; go to step 2 on page 139. The following illustration shows the operator information panel. 138 IBM System x3655 Type 7985: Problem Determination and Service Guide

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Universal
Serial
Bus
(USB)
port
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
Chapter
4,
“Parts
listing,
System
x3655,
Type
7985,”
on
page
97
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.
Symptom
Action
A
USB
device
does
not
work.
1.
Make
sure
that:
v
The
correct
USB
device
driver
is
installed.
v
The
operating
system
supports
USB
devices.
2.
Make
sure
that
the
USB
configuration
options
are
set
correctly
in
the
Configuration/Setup
Utility
program
menu
(see
the
User’s
Guide
for
more
information).
3.
If
you
are
using
a
USB
hub,
disconnect
the
USB
device
from
the
hub
and
connect
it
directly
to
the
server.
4.
Move
the
device
cable
to
a
different
USB
connector.
Video
problems
See
“Monitor
problems”
on
page
132.
Light
path
diagnostics
Light
path
diagnostics
is
a
system
of
LEDs
on
various
external
and
internal
components
of
the
server.
When
an
error
occurs,
LEDs
are
lit
throughout
the
server.
By
viewing
the
LEDs
in
a
particular
order,
you
can
often
identify
the
source
of
the
error.
When
LEDs
are
lit
to
indicate
an
error,
they
remain
lit
when
the
server
is
turned
off,
provided
that
the
server
is
still
connected
to
power
and
the
power
supply
is
operating
correctly.
Before
you
work
inside
the
server
to
view
light
path
diagnostics
LEDs,
read
the
safety
information
that
begins
on
page
vii
and
“Handling
static-sensitive
devices”
on
page
37.
If
an
error
occurs,
view
the
light
path
diagnostics
LEDs
in
the
following
order:
1.
Look
at
the
operator
information
panel
on
the
front
of
the
server.
v
If
the
information
LED
is
lit,
it
indicates
that
information
about
a
suboptimal
condition
in
the
server
is
available
in
the
BMC
system
event
log
or
in
the
system
event/error
log.
v
If
the
system-error
LED
is
lit,
it
indicates
that
an
error
has
occurred;
go
to
step
2
on
page
139.
The
following
illustration
shows
the
operator
information
panel.
138
IBM
System
x3655
Type
7985:
Problem
Determination
and
Service
Guide