Sun Microsystems 5500, Reference Manual

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9-4 Sun Enterprise 6500/5500/4500 Systems Reference Manual • April 1998
9.2.1 System Front Panel LEDs
TABLE 9-1
lists the LED codes for system operations.
LEDs in the system are controlled by OpenBoot™ PROM programming (OBP).
9.2.2 Clock+ Board LEDs
The clock+ board also displays system status. The LED codes are the same as for the
front panel (
TABLE 9-1
).
TABLE 9-1
System Status Codes
Power 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.