IBM 79856au Installation Guide - Page 87

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 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. Symptom Action A USB device does not work. 1. Run USB diagnostics (see "Running the diagnostic programs" in the Problem Determination and Server Guide. 2. Make sure that: v The correct USB device driver is installed. v The operating system supports USB devices. v A standard PS/2 keyboard or mouse is not connected to the server. If it is, a USB keyboard or mouse will not work during POST. 3. Make sure that the USB configuration options are set correctly in the Configuration/Setup Utility program (see the User's Guide for more information). 4. If you are using a USB hub, disconnect the USB device from the hub and connect it directly to the server. Video problems See "Monitor problems" on page 67. Light path diagnostics Use light path diagnostics to diagnose system errors. The light path diagnostics panel is inside the light path diagnostics drawer, on the left front of the server. To access the light path diagnostics panel, slide the latch to the left on the front of the light path diagnostics drawer. The following illustration shows the controls and LEDs on the light path diagnostics panel. REMIND Light Path Diagnostics OVER SPEC PS1 PS2 CPU VRM CNFG MEM NMI S ERR SP DASD RAID FAN TEMP BRD PCI To acknowledge a system error but not take immediate action, press the remind button and place light path diagnostics in Remind mode. When the server is in Chapter 5. Solving problems 73

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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
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.
Symptom
Action
A
USB
device
does
not
work.
1.
Run
USB
diagnostics
(see
“Running
the
diagnostic
programs”
in
the
Problem
Determination
and
Server
Guide
.
2.
Make
sure
that:
v
The
correct
USB
device
driver
is
installed.
v
The
operating
system
supports
USB
devices.
v
A
standard
PS/2
keyboard
or
mouse
is
not
connected
to
the
server.
If
it
is,
a
USB
keyboard
or
mouse
will
not
work
during
POST.
3.
Make
sure
that
the
USB
configuration
options
are
set
correctly
in
the
Configuration/Setup
Utility
program
(see
the
User’s
Guide
for
more
information).
4.
If
you
are
using
a
USB
hub,
disconnect
the
USB
device
from
the
hub
and
connect
it
directly
to
the
server.
Video
problems
See
“Monitor
problems”
on
page
67.
Light
path
diagnostics
Use
light
path
diagnostics
to
diagnose
system
errors.
The
light
path
diagnostics
panel
is
inside
the
light
path
diagnostics
drawer,
on
the
left
front
of
the
server.
To
access
the
light
path
diagnostics
panel,
slide
the
latch
to
the
left
on
the
front
of
the
light
path
diagnostics
drawer.
The
following
illustration
shows
the
controls
and
LEDs
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
To
acknowledge
a
system
error
but
not
take
immediate
action,
press
the
remind
button
and
place
light
path
diagnostics
in
Remind
mode.
When
the
server
is
in
Chapter
5.
Solving
problems
73