IBM 71453RU manual Rear view

Rear view

The following illustration shows the indicators on the rear of the memory expansion module.

EXA	EXA	EXA	QPI	QPI	QPI	QPI	Power
port 1	port 2	port 3	port 1	port 2	port 3	port 4	connectors

Power-on	EXA port 1	AC LED (green)
LED	link LED
Locate	EXA port 2	DC LED (green)
LED	link LED
System	EXA port 3	Power supply
		fault (error) LED
error	link LED
LED

vPower-on LED: When this green LED is lit, it indicates that the memory expansion module is powered on. This LED is functionally equivalent to the power-on LED on the front of the memory expansion module.

vLocate LED: When this blue LED is lit, it indicates that the command from the server IMM to the memory expansion module is complete. Use this blue LED to locate the memory expansion module. The front locate LED also has a button that you can press to locate other servers or other memory expansion modules to which the memory expansion module is connected. This LED is functionally equivalent to the locate LED on the front of the memory expansion module.

vSystem error LED: When this LED is lit, it indicates that a system error has occurred.

vQPI ports: Insert either a QPI cable or a filler panel in each of these connectors.

Note: When you handle the QPI cables, take precautions to avoid damaging the high density interface. Dropping or incorrectly connecting the QPI cables can damage the high density interface. Store the protective covers that come on the end of the QPI cables for reuse when you perform maintenance on the server or memory expansion module or when you remove the cables of any reason.

vPower connector: Connect a power cord to one of these connectors.

vAC power LED: Each hot-swap power supply has an ac power LED and a dc power LED. When the ac power LED is lit, it indicates that sufficient power is being supplied to the power supply through the power cord. During normal operation, both the ac and dc power LEDs are lit.

vDC power LED: Each hot-swap power supply has a dc power LED and an ac power LED. When the dc power LED is lit, it indicates that power supply is supplying adequate dc power to the memory expansion module. During normal operation, both the ac and dc power LEDs are lit.

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

vEXA link LED: When this green LED is lit, it indicates that an EXA link is functioning.

Chapter 1. The System x3850 X5 and x3950 X5 server 27