IBM 71453RU manual LEDs and connectors on the memory expansion module, Front view

LEDs and connectors on the memory expansion module

This section describes the light-emitting diodes (LEDs) and connectors on the front and rear of the memory expansion module.

Front view

The following illustration shows the indicators on the front of the memory expansion module. All of the LEDs are controlled by the integrated management module (IMM) in the host server.

Note: The memory expansion module does not have a power-on control. All functions of the memory expansion module are controlled by the host server to which it is connected.

Power-on	Power supply	Link error	System board
LED	error LED	LED	error LED

Locator	Memory	Fan error	Configuration
button/LED	error LED	LED	error LED

Information panel: This panel contains the indicators for the memory expansion module.

vPower-on LED: When this green LED is lit, it indicates that the memory expansion module is powered on.

vLocate LED: Use this blue LED to locate the memory expansion module. The locate LED also has a button that you can press to light up other servers or other memory expansion modules to which the memory expansion module is connected.

vPower supply fault (error) LED: When this amber LED is lit, it indicates a faulty hot-swap power-supply.

vMemory error LED: When this amber LED is lit, it indicates a DIMM problem.

vLink error LED: When this amber LED is lit, indicates that a QPI link fault or a EXA link fault has occurred. The port LED for the link that has been disconnected will not be lit on the rear of the memory expansion module. EXA link LEDs are on the rear of the memory expansion module, and the QPI link LEDs are on the server to which the memory expansion module is connected.

vFan error LED: When this amber LED is lit, it indicates a fan error.

vSystem board error LED: When this amber LED is lit, it indicates a memory expansion module system-board tray error.

vConfiguration error LED: When this amber LED is lit, it indicates a configuration error. The memory LED might be lit to indicate a memory configuration error.

26IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Installation and User's Guide