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.
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.
| 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 |