System Pulse Leds - Lenovo System x3650 M5 Installation And Service Manual

DC power-supply LEDs
IN OUT
On Off
On Off
On On/
Blinking

System pulse LEDs

The following LEDs are on the system board and monitor the system power-on and power-off sequencing
and boot progress (see "System-board LEDs" on page 38 for the location of these LEDs).
Table 5. System pulse LEDs
LED
IMM2 heartbeat
76
Lenovo System x3650 M5 Installation and Service Guide
Error (!) Description
Off Power-supply not
fully seated, faulty
system board, or
the power supply
has failed.
The power supply
On
has failed.
On The power supply
has failed.
Description
IMM2 heartbeat boot process.
Action
1. Reseat the power supply.
2. Use the Power Configurator
utility to ensure current
system power consumption
is under limitation. For more
information and to download
the utility, go to
http://
www.ibm.com/ systems/
bladecenter/ resources/
powerconfig.html .
3. Check the error LEDs on the
system board and the IMM2
error messages. Follow steps
in "Power problems" on page
94 and "Solving power
problems" on page 106 until
the problem is solved.
Replace the power supply.
Replace the power supply.
Action
The following steps describe the different
stages of the IMM2 heartbeat sequencing
process.
1. When this LED is blinking fast
(approximately 4Hz), this indicates, that the
IMM2 code is in the loading process.
2. When this LED goes off momentarily, this
indicates that the IMM2 code has loaded
completely.
3. When this LED goes off momentarily and
then starts blinking slowing (approximately
1Hz), this indicates that IMM2 is fully
operational. You can now press the power-
control button to power-on the server.
4. If this LED does not blink within 30 seconds
of connecting a power source to the server,
(trained technician only) replace the system
board.
Notes
Typically indicates a
power-supply is not
fully seated.