Lenovo RD120 User Manual
Page 25
10
USB
3
connector
20
Power
supply
1
Power-cord
connector
(ac
power
supply
only):
Connect
the
power
cord
to
this
connector.
Attention:
In
a
dc
power
environment,
only
trained
service
personnel
other
than
Lenovo
service
technicians
are
authorized
to
connect
or
disconnect
power
to
the
dc
power
supply.
See
the
documentation
that
comes
with
each
dc
power
supply.
AC
power
LED:
Each
hot-swap
power
supply
has
an
ac
power
LED
and
a
dc
power
LED.
When
the
ac
power
LED
is
lit,
it
indicates
that
sufficient
power
is
coming
into
the
power
supply
through
the
power
cord.
During
typical
operation,
both
the
ac
and
dc
power
LEDs
are
lit.
For
any
other
combination
of
LEDs,
see
the
Hardware
Maintenance
Manual
on
the
ThinkServer
Documentation
DVD.
DC
power
LED:
Each
hot-swap
power
supply
has
a
dc
power
LED
and
an
ac
power
LED.
When
the
dc
power
LED
is
lit,
it
indicates
that
the
power
supply
is
supplying
adequate
dc
power
to
the
system.
During
typical
operation,
both
the
ac
and
dc
power
LEDs
are
lit.
For
any
other
combination
of
LEDs,
see
the
Hardware
Maintenance
Manual
on
the
ThinkServer
Documentation
DVD.
Systems-management
Ethernet
connector:
Use
this
connector
to
connect
the
server
to
a
network
for
systems-management
information
control.
This
connector
is
active
only
if
you
have
installed
a
Remote
Supervisor
Adapter
II
SlimLine,
and
it
is
used
only
by
the
Remote
Supervisor
Adapter
II
SlimLine.
Ethernet
activity
LEDs:
When
these
LEDs
are
lit,
they
indicate
that
the
server
is
transmitting
to
or
receiving
signals
from
the
Ethernet
LAN
that
is
connected
to
the
Ethernet
port.
Ethernet
link
LEDs:
When
these
LEDs
are
lit,
they
indicate
that
there
is
an
active
link
connection
on
the
10BASE-T,
100BASE-TX,
or
1000BASE-TX
interface
for
the
Ethernet
port.
Ethernet
connectors:
Use
either
of
these
connectors
to
connect
the
server
to
a
network.
USB
connectors:
Connect
a
USB
device,
such
as
USB
mouse,
keyboard,
or
other
USB
device,
to
any
of
these
connectors.
Video
connector:
Connect
a
monitor
to
this
connector.
The
video
connectors
on
the
front
and
rear
of
the
server
can
be
used
simultaneously.
System-error
LED:
When
this
LED
is
lit,
it
indicates
that
a
system
error
has
occurred.
An
LED
on
the
diagnostics
panel
is
also
lit
to
help
isolate
the
error.
System-locator
LED:
Use
this
LED
to
visually
locate
the
server
among
other
servers.
Power-on
LED:
When
this
LED
is
lit
and
not
flashing,
it
indicates
that
the
server
is
turned
on.
When
this
LED
is
flashing,
it
indicates
that
the
server
is
turned
off
and
still
connected
to
a
power
source.
When
this
LED
is
off,
it
indicates
that
power
is
not
present,
or
the
power
supply
or
the
LED
itself
has
failed.
Chapter
1.
The
ThinkServer
RD120
server
11