Universal serial bus (usb) port problems, Video problems, Easyled diagnostics – Lenovo 3797 User Manual
Page 158: Universal, Serial, Usb), Port, Problems, Video, Easyled
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
EasyLED
Diagnostics
Use
EasyLED
Diagnostics
to
diagnose
system
errors.
The
diagnostics
panel
is
behind
the
operator
information
panel,
on
the
left
front
of
the
server.
To
access
the
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
diagnostics
panel.
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.
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.
142
ThinkServer
RD220
Types
3729,
3779,
3797,
and
3798:
Installation
and
User
Guide