Lenovo 6445 用户手册
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
Hardware
Maintenance
Manual
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
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
Light
path
diagnostics
Use
light
path
diagnostics
to
diagnose
system
errors.
The
light
path
diagnostics
panel
is
behind
the
operator
information
panel,
on
the
left
front
of
the
server.
To
access
the
light
path
diagnostics
panel,
slide
the
release
latch
on
the
front
of
the
operator
information
panel
to
the
left.
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
to
place
the
server
in
Remind
mode.
When
the
server
is
in
Remind
mode,
the
system-error
LED
on
the
front
of
the
server
flashes.
If
a
new
failure
occurs,
the
system-error
LED
is
lit
again.
Chapter
5.
Solving
problems
77