System Pulse Leds; Server Power Features - Lenovo x3300 M4 7382 Installation And Service Manual

Power-supply LEDs
Error (!)
AC DC
On Off
On On

System pulse LEDs

This section contains information about the 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 33 for the location of these LEDs)
Description
LED
RTMM Power-on and power-
heartbeat off sequencing.
IMM2 IMM2 heartbeat boot
heartbeat process.

Server power features

When the server is connected to an ac power source but is not turned on, the operating system does not run,
and all core logic except for the service processor (the Integrated Management Module II) is shut down.
However, the server can respond to requests to the service processor, such as a remote request to turn on
the server. The power-on LED flashes to indicate that the server is connected to ac power but is not turned
on.
Turning on the server
Use this information to turn on the server.
Approximately 5 seconds after the server is connected to ac power, one or more fans might start running to
provide cooling while the server is connected to power and the power-on button LED will blink quickly.
Approximately 1 to 3 minutes after the server is connected to ac power, the power-control button becomes
active (the power-on LED will blink slowly), and one or more fans might start running to provide cooling while
the server is connected to power. You can turn on the server by pressing the power-control button.
The server can also be turned on in any of the following ways:
Description
On Faulty power-
supply
On Faulty power-
supply
Action
1. If the LED blinks at 1Hz, it is functioning properly and no action is
necessary.
2. If the LED is not blinking, (trained technician only) replace the system
board.
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.
Action
Replace the power supply.
Replace the power supply.
.
Chapter 1 The Lenovo System x3300 M4 Type 7382 server
Notes
23