LEDs and connectors on the memory expansion moduleThis section describes the light-emitting diodes (LEDs) and connectors on the frontand rear of the memory expansion module.Front viewThe following illustration shows the indicators on the front of the memoryexpansion module. All of the LEDs are controlled by the integrated managementmodule (IMM) in the host server.Note: The memory expansion module does not have a power-on control. Allfunctions of the memory expansion module are controlled by the host server towhich it is connected.Power-onLEDLocatorbutton/LEDPower supplyerror LEDMemoryLEDerrorLinkLEDerrorFanLEDerrorSystem boardLEDerrorConfigurationLEDerrorInformation panel: This panel contains the indicators for the memory expansionmodule.v Power-on LED: When this green LED is lit, it indicates that the memoryexpansion module is powered on.v Locate LED: Use this blue LED to locate the memory expansion module. Thelocate LED also has a button that you can press to light up other servers orother memory expansion modules to which the memory expansion module isconnected.v Power supply fault (error) LED: When this amber LED is lit, it indicates a faultyhot-swap power-supply.v Memory error LED: When this amber LED is lit, it indicates a DIMM problem.v Link error LED: When this amber LED is lit, indicates that a QPI link fault or aEXA link fault has occurred. The port LED for the link that has beendisconnected will not be lit on the rear of the memory expansion module. EXAlink LEDs are on the rear of the memory expansion module, and the QPI linkLEDs are on the server to which the memory expansion module is connected.v Fan error LED: When this amber LED is lit, it indicates a fan error.v System board error LED: When this amber LED is lit, it indicates a memoryexpansion module system-board tray error.v Configuration error LED: When this amber LED is lit, it indicates aconfiguration error. The memory LED might be lit to indicate a memoryconfiguration error.Chapter 1. The System x3850 X5 and x3950 X5 server 25
