IBM 7379E2U User Manual - Page 34

Server power features, Turning on the server

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Table 3. Power-supply LEDs Power-supply LEDs AC power DC power Power error Off Off Off Off Off On Off On Off Off On On On Off Off On Off or flashing On On On Off On On On Description No AC power to the server or a problem with the AC power source No AC power to the server or a problem with the AC power source and the power supply has detected an internal problem Faulty power supply Faulty power supply Power supply not fully seated, faulty system board, or faulty power supply Faulty power supply Normal operation Power supply is faulty but still operational 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 integrated management module (IMM) is shut down; however, the server can respond to requests from the IMM, 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 not turned on. Turning on the server Approximately 20 seconds after the server is connected to AC power, the power-control button becomes active, and one or more fans might start running to provide cooling while the server is connected to power. You can turn on the server and start the operating system by pressing the power-control button. The server can also be turned on in any of the following ways: 18 IBM System x3400 M3 Type 7378/7379: Installation and User's Guide

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Table 3. Power-supply LEDs
Power-supply LEDs
Description
AC power
DC power
Power error
Off
Off
Off
No AC power to the server or a problem
with the AC power source
Off
Off
On
No AC power to the server or a problem
with the AC power source and the power
supply has detected an internal problem
Off
On
Off
Faulty power supply
Off
On
On
Faulty power supply
On
Off
Off
Power supply not fully seated, faulty
system board, or faulty power supply
On
Off or flashing
On
Faulty power supply
On
On
Off
Normal operation
On
On
On
Power supply is faulty but still operational
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 integrated
management module (IMM) is shut down; however, the server can respond to
requests from the IMM, 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 not
turned on.
Turning on the server
Approximately 20 seconds after the server is connected to AC power, the
power-control button becomes active, and one or more fans might start running to
provide cooling while the server is connected to power. You can turn on the server
and start the operating system by pressing the power-control button.
The server can also be turned on in any of the following ways:
18
IBM System x3400 M3 Type 7378/7379: Installation and User's Guide