Download 3 - Oracle Documentation

9
9.2.1 System Front Panel LEDs
LEDs in the system are controlled by OpenBoot™ PROM programming (OBP).
Table 9-1 lists the LED codes for system operations.
Table 9-1
Power
System Status Codes
Service
Cycling
Condition
Off
Off
Off
No power or the key switch is in the Off position.
Off
On
Off
Failure mode. System has electrical power.
Off
Off
On
Failure mode. System has electrical power.
Off
On
On
Failure mode. System has electrical power.
On
Off
Off
System is hung, either in POST/OBP or in the
operating system.
On
Off
On
Hung in OS.
On
On
Off
(Hung in POST/OBP) or (hung in OS and failed
component in system).
On
On
On
(Hung in POST/OBP) or (hung in OS and failed
component in system).
On
Off
Flashing
OS running. System is operating normally.
On
On
Flashing
OS running and failed component in system.
On
Flashing
Off
Slow flash = POST. Fast flash = OBP.
On
Flashing
On
OS or OBP error.
9.2.2 Clock Board LEDs
The clock board also displays system status. The LED codes are the same as for
the front panel. See Table 9-1.
9.2.3 CPU/Memory and I/O Board LEDs
For hot-pluggable boards, most of the LED codes correspond to those shown in
Table 9-1. The most important exception is the second code (Off-On-Off). For
hot-pluggable boards, Off-On-Off indicates that the board is in low-power
mode and is ready for removal.
Troubleshooting Overview
9-3