Sun Enterprise 6500/5500/4500 Systems Reference Manual

CPU/Memory+ and I/O+ Board LEDs

Table 9-2 summarizes LED codes for boards. The Power, Service, and Cycling symbols are marked on the card cage frame above the respective LEDs. Note that many but not all of the LED codes are the same as the system codes (Table 9-1).

Table 9-2 Board Status LED Codes


Power	Service	Cycling	Condition
Off	Off	Off	Board has no electrical power.
Off	On	Off	Board is in low-power mode, can be unplugged.
Off	Off	Flashing	Undefined.
Off	On	Flashing	Undefined.
On	Off	Off	System is hanging, either in POST/OBP or OS.
On	Off	On	Hung in OS.
On	On	Off	(Hung in POST/OBP) or (hung in OS and failed component on board).
On	On	On	(Hung in POST/OBP) or (hung in OS and failed component on board).
On	Off	Flashing	OS running. System is operating normally.
On	On	Flashing	OS running and failed component on board.
On	Flash	Off	Slow flash = POST. Fast flash = OBP.
On	Flash	On	OS or OBP error.

Note -

For boards, Off-On-Off indicates that the board is in low-power mode and is ready for removal. (For the system, Off-On-Off indicates a failure.)

Caution -

If the Power LED is lit, do not remove the board. Removing a board that is not in low-power mode will damage the board and the system.