AC power LEDThis green LED provides status information about the power supply. Duringtypical operation, both the ac and dc power LEDs are lit.DC power LEDThis green LED provides status information about the power supply. Duringtypical operation, both the ac and dc power LEDs are lit.Fault-error LEDWhen this yellow LED is lit, it indicates that the power supply has failed.Serial connectorConnect a 9-pin serial device to this connector. The serial port is sharedwith the integrated management module II (IMM2). The IMM2 can takecontrol of the shared serial port to redirect serial traffic, using Serial overLAN (SOL).Video connectorConnect a monitor to this connector.USB connectorsConnect USB devices to these connectors.NMI buttonPress this button to force a nonmaskable interrupt to the microprocessor. Itallows you to blue screen the server and take a memory dump (use thisbutton only when directed by the IBM service support). You might have touse a pen or the end of a straightened paper clip to press the button.Ethernet connectorUse either of these connectors to connect the server to a network. Whenyou use the Ethernet 0 connector, the network can be shared with theIMM2 through a single network cable.Ethernet transmit/receive activity LEDThis LED is on the Ethernet connector. When this LED is flashing, itindicates that there is activity between the server and the network.Ethernet link status LEDThis LED is on the Ethernet connector. When this LED is lit, it indicates thatthere is an active connection on the Ethernet port.Server power featuresWhen the server is connected to an ac power source but is not turned on, theoperating system does not run, and all core logic except for the integratedmanagement module II (IMM2) is shutdown; however, the server can respond torequests from IMM2, such as a remote request to turn on the server. The power-onLED flashes to indicate that the server is connected to ac power but is not turnedon.Turning on the serverNote: Approximately 1 to 3 minutes after the server is connected to ac power, thepower-control button becomes active after the power-on LED flashes slowly.The server can also be turned on in any of the following ways:v If a power failure occurs while the server is turned on, the server will restartautomatically when power is restored.v If your operating system supports the Wake on LAN feature, the Wake on LANfeature can turn on the server.Chapter 2. Introduction 15
