Lit: The server is turned on.Fading on and off: The server is in a reduced-power state. To wake theserver, press the power-control button or use the IMM Web interface. See“Logging on to the Web interface” on page 146 for information on logging onto the IMM Web interface.v Ethernet activity LEDs: When any of these LEDs is flashing or flickering, itindicates that the server is transmitting to or receiving signals from the EthernetLAN that is connected to the Ethernet port that corresponds to that LED.v Locator button/LED: Use this blue LED to visually locate the server amongother servers. This LED is also used as a presence detection button. You can useIBM Systems Director to light this LED remotely. This LED is controlled by theIMM. When you press the locator button, the LED will be lit and it will continueto be lit until you press it again to turn it off. Press the locator button to visuallylocate the server among the others servers. In a two-node configuration, thisLED will be lit on the primary server and this LED will blink on the secondaryserver during POST, if the button is pressed or an IPMI command is issued toturn on the LED. It is also used as the physical presence for the Trusted PlatformModule (TPM).v Information LED: When this amber LED is lit, it indicates that a noncriticalevent has occurred. Check the system-event log for additional information. Seethe Problem Determination and Service Guide on the IBM Documentation CD formore information about event logs.v System-error LED: When this amber LED is lit, it indicates that a system errorhas occurred. A system-error LED is also on the rear of the server. An LED onthe light path diagnostics panel on the operator information panel is also lit tohelp isolate the error. This LED is controlled by the IMM.Light path diagnostics panelThe light path diagnostics panel is on the top of the operator information panel.For additional information about the LEDs on the light path diagnostics panel, seeProblem Determination and Service Guide.Note: The system service label on the underside of the cover also providesinformation about the location of the light path diagnostics LEDs.To access the light path diagnostics panel, push the blue release button on theoperator information panel to the left. Pull forward on the unit until the hinge ofthe operator panel is free of the server chassis. Then pull down on the unit, so thatyou can view the light path diagnostics panel information.Note: When you slide the light path diagnostics panel out of the server to checkthe LEDs or checkpoint codes, do not run the server continuously with light pathdiagnostics panel outside of the server. The panel should only be outside of theserver a short time. The light path diagnostics panel must remain in the serverwhen the server is running to ensure proper cooling.Chapter 1. The System x3690 X5 Types 7147, 7148, 7149, and 7192 server 19
