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SAS/SATA Controller LED
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DIMM 1-6 error LEDs
8
IMM heart beat LED
Table 7. System-board LEDs
LED Description
Error LEDs
When one of these LEDs is lit, it indicates that the associated component has
failed.
Baseboard management controller
heartbeat LED
This LED ashes to indicate that the IMM is functioning normally.
Standby power LED
When this LED is lit, it indicates that the server is connected to ac power.
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) 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 ashes to indicate that the server is connected to ac power but is not turned on.
Turning 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 ashes quickly.
Approximately 1 to 3 minutes after the server is connected to ac power, the power-control button becomes
active (the power-on LED ashes 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:
• If a power failure occurs while the server is turned on, the server will restart automatically when power
is restored.
• If your operating system supports the ®Wake on LAN feature, the ®Wake on LAN feature can turn on
the server.
Note: When 4 GB or more of memory (physical or logical) is installed, some memory is reserved for various
system resources and is unavailable to the operating system. The amount of memory that is reserved for
system resources depends on the operating system, the conguration of the server, and the congured
PCI devices.
Turning off the server
When you turn off the server and leave it connected to ac power, the server can respond to requests to
the service processor, such as a remote request to turn on the server. While the server remains connected
to ac power, one or more fans might continue to run. To remove all power from the server, you must
disconnect it from the power source.
Some operating systems require an orderly
shutdown before you turn off the server. See your
operating-system documentation for information about shutting down the operating system.
Statement 5
Chapter 5. Locating Server Controls and connectors 113