Table 4. Button on the standard I/O bookserverButton name FunctionNMI button This button is on the rear of the standardI/O book. Press this button to force anonmaskable interrupt to themicroprocessor. You might have to use a penor the end of a straightened paper clip topress the button. You can also use it to forcea blue-screen memory dump (use this buttononly when you are directed to do so by IBMSupport).Server power featuresThis topic 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 serverThis topic provides information about starting the server.Approximately 5 seconds after the server is connected to input power, one or morefans might start running and the power-on LED flashes quickly. After thepower-on button becomes active, the power-on LED flashes one flash per second.You can turn on the server by pressing the power-on button.If a system input power source failure occurs while the server is turned on, theserver will restart automatically when power is restored.Note: To disable this feature in the server Setup utility (see “Using the Setuputility” on page 126), select System Settings → Integrated Management Module →Power Restore Policy.Turning off the serverThis topic provides information about turning off the server.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.Chapter 1. The IBM System x3850 X6 and x3950 X6 Types 3837 and 3839 server 41
