v DC power LED: Each hot-swap power supply has a dc power LED and an acpower LED. When the dc power LED is lit, it indicates that the power supply issupplying adequate dc power to the system. During normal operation, both theac and dc power LEDs are lit. For any other combination of LEDs, see“Power-supply LEDs” on page 179.Server power featuresThis information provides an overview of the server power features.When the server is connected to a suitable input power source but is not turnedon, the operating system does not run, and all core logic except for the serviceprocessor (the integrated management module) is shut down; however, the servercan respond to requests to the service processor, such as a remote request to turnon the server. The power-on LED flashes and indicates that the server is connectedto input power but is not turned on.Turning on the serverUse this information for details about turning the server on.Approximately 5 seconds after the server is connected to input power, one or morefans might start running and the power-on LED flashes quickly. Approximately 10seconds after the server is connected to input power, the power-on button becomesactive. After the power-on button becomes active, the power-on LED flashesslowly. You can turn on the server by pressing the power-on button.If a power failure occurs while the server is turned on, the server will restartautomatically when power is restored.Note: To disable this feature in the Setup utility (see “Using the Setup utility” onpage 142), select System Settings → Integrated Management Module → PowerRestore Policy.Turning off the serverUse this information for details about turning the server off.When you turn off the server and leave it connected to input power, the server canrespond to requests to the service processor (the integrated management module),such as a remote request to turn on the server. While the server remains connectedto input power, one or more fans might continue to run. To remove all power fromthe server, you must disconnect it from the power source.Some operating systems require an orderly shutdown before you turn off theserver. See your operating-system documentation for information about shuttingdown the operating system.Statement 522 System x3750 M4 Types 8722 and 8733: Installation and Service Guide
