Off: AC power is not present, or the power supply or the LED itself has failed.Flashing rapidly (4 times per second): The server is turned off and is notready to be turned on. The power-control button is disabled. In a fullyconfigured server, it could take up to 8 minutes after the server is connectedto ac power, before the power-control button becomes active.Flashing slowly (once per second): The server is turned off and is ready tobe turned on. You can press the power-control button to turn on the server.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. Forinformation about logging on to the IMM Web interface, see “Logging on tothe Web interface” on page 97.v Ethernet icon LED: This LED lights the Ethernet icon.v Information LED: When this LED is lit, it indicates that a noncritical event hasoccurred. An LED on the light path diagnostics panel is also lit to help isolate theerror.v System-error LED: When this LED is lit, it indicates that a system error hasoccurred. An LED on the light path diagnostics panel is also lit to help isolate theerror.v Locator button and locator LED: Use this LED to visually locate the serveramong other servers. It is also used as the physical presence for trusted PlatformModule (TPM). Press this button to turn on or turn off this LED locally. You canuse IBM Systems Director to light this LED remotely.In a two-node configuration, this LED is lit on the primary server and flashes onthe secondary server during POST.You can press this button or use an IPMI command to turn this LED on or off.v Ethernet port activity LEDs: When either of these LEDs is lit, it indicates thatthe server is transmitting to or receiving signals from the Ethernet LAN that isconnected to the Ethernet port that corresponds to that LED.Light path diagnostics panelThe light path diagnostics panel is on the top of the operator information panel.To access the light path diagnostics panel, slide the blue release button on theoperator information panel to the left. Pull forward on the operator information paneluntil the hinge of the panel is free of the server chassis. Then pull down on theoperator information panel, so that you can view the light path diagnostics panelinformation.Chapter 1. The System x3850 X5 and x3950 X5 server 13
