Lenovo 3797 User Manual
Page 39
The
following
illustration
shows
the
LEDs
on
the
rear
of
the
server:
1
Ethernet
activity
LED
5
Power-supply
error
LED
(amber)
2
Ethernet
link
LED
6
System-error
LED
(amber)
3
AC
power
LED
(green)
7
Locator
LED
(blue)
4
DC
power
LED
(green)
8
Power-on
LED
(green)
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.
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.
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.
Power-supply
error
LED:
When
the
power-supply
error
LED
is
lit,
it
indicates
that
the
power
supply
has
failed.
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.
Power-on
LED:
Press
this
button
to
turn
the
server
on
and
off
manually
or
to
wake
the
server
from
a
reduced-power
state.
The
states
of
the
power-on
LED
are
as
follows:
Off:
AC
power
is
not
present,
or
the
power
supply
or
the
LED
itself
has
failed.
Flashing
rapidly
(4
times
per
second):
The
server
is
turned
off
and
is
not
ready
to
be
turned
on.
The
power-control
button
is
disabled.
Approximately
3
minutes
after
the
server
is
connected
to
ac
power,
the
power-control
button
becomes
active.
Flashing
slowly
(once
per
second):
The
server
is
turned
off
and
is
ready
to
be
turned
on.
You
can
press
the
power-control
button
to
turn
on
the
server.
Lit:
The
server
is
turned
on.
Chapter
4.
Server
controls,
LEDs,
and
power
23