Cooling fan LEDs
An amber LED incorporated in each cooling fan monitors its status. Constant On indicates a fault condition. .
Drive carrier module LEDs
Disk drive status is monitored by a green LED and an amber LED mounted on the front of each drive carrier module. The conditions for each LED are defined in “Drive carrier module faults” on page 30.
Rear panel LED
Table 8. Rear panel status LED
Enclosure ID LED
Blue (when activated)
Activated by push button on the front operator's panel, or by system software. Used to identify a server from among several servers.
Server board LEDs
Server board LEDs consist of I/O panel status LEDs and I/O panel NIC LEDs.
I/O panel status LEDs
The server board I/O panel contains a number of diagnostic LEDs, whose functions are summarized in the following table. Refer to your server board documentation for full details of each LED state.
Table 9. Server board status LEDs
LED | Color | Function | ||
|
|
|
|
|
System status LED | v | Green | v | System OK |
| v | Off | v | AC power off |
| v | Alternating green/amber | v | System not ready |
| v | Amber | v | Critical fault |
| v | Green blink | v | System degraded |
| v | Amber blink | v | |
|
|
|
| likely to fail |
|
|
| ||
4 x | Off | System running normally | ||
LEDs |
|
|
|
|
|
|
| The POST LEDs toggle | |
| *Amber | between red, green, amber, | ||
|
|
| and Off at boot up. | |
|
|
| *(Lit amber only if a | |
|
|
| failure occurs) | |
|
|
|
|
|
I/O panel NIC LEDs
The Network Interface Controller (NIC) LED states are summarized in the following table. Refer to your server board documentation for full details of each state.
Chapter 5. Troubleshooting and problem solving 25
