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Component and attention LEDs

The component and attention light-emitting diodes (LEDs) assist in identifying devices and components in your server when an action is needed or if there is a failure.

If a failing component is detected in your system, an amber attention LED on the front of the system unit is turned on solid (not blinking). You can use the service processor menus (available from the Advanced System Management Interface) or AIX® Service Aid menu to blink the field replaceable unit (FRU) LED for the failing FRU.

Individual LEDs are located on or near the failing field replaceable unit (FRU). The LEDs are located either on the component itself or on the carrier of the component (for example, memory card, fan, memory module, CPU). LEDs are either green or amber.

Green LEDs indicate either of the following:

Amber LEDs indicate a fault or identify condition. If your system or one of the components in your system has an amber LED turned on or blinking, identify the problem and take the appropriate action to restore the system to normal.

The following table identifies the color and status of the component and attention LEDs. Units or FRUs may not have all of the LEDs listed in the table.

Table 1. Component and attention LEDs
Unit (FRU) LED Function LED Color Off On Blink
System attention Attention Amber Normal Fault Identify
System power Power Green No ac power System on Standby
Fan Identify Amber Normal   Identify
Power Green No power Power on  
Power supply ac power input good Green No Input Input good  
Identify Amber Normal Fault Identify
dc power output good Green All power supply outputs off All power supply outputs on Control voltage good
Disk drives Activity Green No disk activity Disk being accessed  
Identify Amber     Identify
PCI slot Power Green No power Power on  
Identify Amber Normal   Identify
RIO/HSL Identify Amber Normal   Identify
Memory DIMM Identify Amber Normal   Identify
System backplane Identify Amber Normal   Identify
PCI riser card Power Green No power Power on  
Identify Amber Normal   Identify
Disk drive backplane Identify Amber Normal   Identify
Media backplane Identify Amber Normal   Identify
Service processor card Identify Amber Normal   Identify
Voltage regulator module Identify Amber Normal   Identify
RAID adapter card Identify Amber Normal   Identify
HMC port Link Green No link Link  
Activity Green No activity   Activity
Imbedded Ethernet Link Green No link Link  
Activity Green No activity   Activity
Node assembly Power Green No power Power on  
Identify Amber Normal   Identify
Bulk power controller (BPC) Activity Green No power Power on  
Identify Amber Normal   Identify
Motor drive assembly (MDA) Power Green No power Power on  
Motor scroll assembly (MSA) Identify Amber Normal   Identify
MCM Identify Amber Normal   Identify
Light strip Power Green No power Power on  
Identify Amber Normal   Identify


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Last updated: Tue, September 23, 2014