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. Press this button to turn on or turn off this LED locally. Youcan use IBM Systems Director to light this LED remotelyv 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.Operator informationpanelLight pathdiagnostics LEDsRelease latchThe following illustration shows the controls and LEDs on the light path diagnosticspanel.Notes:1. Do not run the server for an extended period of time while the light pathdiagnostics panel is pulled out of the server.2. Light path diagnostics LEDs remain lit only while the server is connected topower.DASDNMIPCIPS SPCNFGMEMCPUFANVRMOVER SPECTEMPLight Path DiagnosticsBRDLOG LINKRAIDREMINDNMI buttonReset buttonRemindbuttonCheck pointcode displayChapter 1. The System x3850 X5 and x3950 X5 server 13
