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.
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
(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.
System-board
error
LEDs
The
following
illustration
shows
the
LEDs
on
the
system
board.
You
might
have
to
refer
to
this
illustration
when
you
solve
problems
with
the
server.
DIMM 1 LED
DIMM 2 LED
DIMM 3 LED
DIMM 4 LED
Microprocessor
fan LED
Each
error
LED
is
lit
to
indicate
a
problem
with
a
specific
component.
After
a
problem
is
corrected,
its
LED
will
not
be
lit
the
next
time
the
server
is
restarted;
if
the
problem
remains,
the
LED
will
be
lit
again.
See
the
Problem
Determination
and
Service
Guide
on
the
IBM
System
x
Documentation
CD
for
additional
information.
60
System
x3100
Type
4348:
Installation
Guide
Summary of Contents for 4348
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