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Turning off the server
When you turn off the server and leave it connected to ac power, the server can
respond to requests from the IMM, 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.
Important: To view the error LEDs on the system board, leave the server
connected to a 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:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
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The server can be turned off in any of the following ways:
v You can turn off the server from the operating system, if your operating system
supports this feature. After an orderly shutdown of the operating system, the
server will be turned off automatically.
v You can press the power-control button to start an orderly shutdown of the
operating system and turn off the server, if your operating system supports this
feature.
v If the operating system stops functioning, you can press and hold the
power-control button for more than 4 seconds to turn off the server.
v The IMM can turn off the server as an automatic response to a critical system
failure.
v You can turn off the server through a request from the IMM.
148 ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual