Power-supply leds, System pulse leds, Power-supply – Lenovo RD210 User Manual
Page 50: Leds, System, Pulse
Power-supply
LEDs
The
following
illustration
shows
the
location
of
the
power-supply
LEDs
on
the
rear
of
the
server.
See
the
Hardware
Maintenance
Manual
for
additional
information
on
solving
power
supply
problems.
Table
4.
1
AC
LED
(green)
2
DC
LED
(green)
3
Power
supply
error
LED
(amber)
System
pulse
LEDs
The
following
LEDs
are
on
the
system
board
and
monitors
the
system
power-on
and
power-off
sequencing
and
boot
progress
(see
for
the
location
of
these
LEDs):
Table
5.
System
pulse
LEDs
LED
Description
Action
Enclosure
manager
heartbeat
power-on
and
power-off
sequencing.
1.
If
the
LED
blinks
at
1Hz,
it
is
functioning
properly
and
no
action
is
necessary.
2.
If
the
LED
is
not
blinking,
(trained
service
technician
only)
replace
the
system
board.
34
ThinkServer
RD210
Types
3795,
3796,
3818,
and
3819:
Installation
and
User
Guide